updated submodules

* Update CHANGELOG.md

* Update CHANGELOG.md

CHANGELOG.md

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 # Change log
 
+## 5.6.4
+
+### Fixes
+
+#### Back-end
+
+* Fix several vulnerabilities in convertion app (Bug #46348, Bug #46352, Bug #46353,
+  Bug #46384, Bug #46434, Bug #46436)
+* Fix vulnerability in TXT converter (Bug #46437)
+* Fix Path Traversal vulnerability via image upload params (Bug #46113)
+* Fix Path Traversal vulnerability via `savefile` param (Bug #46037)
+* Fix Path Traversal vulnerability via Convert Service param (Bug #45976)
+
+## 5.6.0
+
+### New features
+
+#### All Editors
+
+* Support of Private Rooms plugin (ONLYOFFICE Enterprise Edition 11.0 needed as well)
+* Possibility to gain access to some features of commercial versions Document Server
+
+### Fixes
+
+#### All Editors
+
+* Fixed opening zero-bytes files created with MS Office folder menu
+* Fixed an issue with opening long path files (Bug 45117)
+* Added ability to run an application with system title bar by --system-title-bar flag (Linux) (Bug 43189) (#271)
+* Fixed an unexpected application window behavior after presentation showing was ended (Bug 44968)
+* Fixed an unexpected application behavior after undocking window with presenter mode (Bug 45483)
+* Fixed an ability of resizing application windows on macOS (Bug 45135)
+* Fixed an issue with connecting to cloud servers if url contains spaces (Bug 42293)
+* Fixed an issue with restoring application window after some scenarios (Bug 45292)
+* Fixed a dialog window displaying while all application windows is closing (Bug 44974)
+* Fixed a window title scaling on HiDPI displays in some scenarios (Bug 45060)
+* Fixed a duplication of print button after undocking PDF-viewer window (Bug 45170)
+* Some translations in dialog windows was improved
+* Fixed a position of application window after printing operations was canceled (Bug 45003)
+* Fixed an issue with displaying artifacts on about page in some scenarios (Bug 44684)
+* Fixed an issue with displaying artifacts after installation on Windows 10 was finished (Bug 45089)
+* Fixed an issue with user name updating while document is opened (Bug 45254)
+* Added user name limitation in field (Bug 44742)
+* Fixed an issue with locking modal dialogs while print dialogue in opened and updocked (Bug 42791)
+* Fixed an editor tab position after window is attaching (Bug 44749)
+* Added custom title for Windows Apps entry in Add or Remove Programs
+* Fixed unexpected system rebooting after VSRedis installation
+* Fixed displaying of dialogue windows on some linux color schemes (Bug 31995)
+
+#### Document Editor
+
+* Fixed in issue with autocolor feature for graphical objects in some DOCX user files (Bug 45460)
+* Fixed an issue with increasing font size in some DOCX user files (Bug 44852)
+* Fixed disabling undo/redo buttons after the documents comparing
+* Fixed incorrect displaying of some PDF user files (Bug 45336, Bug 39097, Bug 19078)
+* Fixed incorrect displaying of watermark on CJK languages (Bug 45886)
+* Fixed an export of some DOCX user files to PDF (Bug 45319)
+
+
+#### Spreadsheet Editor
+
+* Fixed invalid icon in cells border menu (Bug 45910)
+* Fixed an error with copy and past format table in some XLSX files (Bug 45731)
+* Fixed an error with format table creation in some XLSX files (Bug 45773)
+* Fixed an error with entering big data in last partially view cell (Bug 45653) (#903)
+* Fixed an appearance of color selection dialogue box for bullet lists (Bug 45417)
+
+#### Presentation Editor
+
+* Fixed an appearance of color selection dialogue box for bullet lists (Bug 45417)
+
+#### files editing/convertion
+
+
+## 5.5.1
+
+### New features
+
+#### All Editors
+
+* Multi-Window mode (Windows, Linux)
+* Loading speed improvements
+* `Symbol table` now is system component, not a plugin
+* New button `Top Toolbar -> Collaboration -> Remove comments`
+* Replace `Default Size` button to `Actual Size`
+
+#### Document Editor
+
+* Ability to remove table cells
+* Ability to insert several rows\columns
+* Ability to add titles for shapes, table and levels
+* New options for margins
+* New options for bullet lists
+* Ability to draw and erase table
+* Ability to edit gutter and mirror margins
+
+#### Spreadsheet Editor
+
+* Added support of reading drop-down lists.
+* Added support of reading data validation.
+* Ability to recalculate all formulas
+* New scale options
+* New options for cell fill
+* Ability to set Cell Snapping
+* Sheets multi-select
+* Bullets and numbering options from context menu
+* Ability to change bullets marker
+* New spellchecker options
+* Ability to sort by several columns\rows
+* Option for setting separators
+
+#### Presentation Editor
+
+* Ability to add object to slide template
+* Ability to reset slide
+* New list settings
+* Ability to add object to placeholder
+
+### Fixes
+
+#### All Editors
+
+* All components received countless fixed
+* Localization improvements
+* Fixed some security issues
+* Fix some more issues with user files
+
+#### Document Editor
+
+* Fixed an issue with comment duplication in other editors (bug #44689)
+
+#### Spreadsheet Editor
+
+* Better support of TIME function (bug #44849)
+
+#### files editing/convertion
+
+* Fixed some security issues
+* Fixed an issues with DOC, RTF and XLSX formats(bug 44756) (bug 44934) (bug 44840)
+* Fixed corrupting of mime-type after some DOCX editing (Bug 44957)
+
+
 ## 5.4.2
 
 ### Fixes