Update libreoffice to version 7.6.7 (#1345)

libreoffice/docker-compose.yml

@@ -7,7 +7,7 @@ services:
       APP_PORT: 3000
 
   server:
-    image: linuxserver/libreoffice:7.2.7@sha256:1f434cd23a010dce12af364cc0a7e71e4fdb8299bcc6f9b022ae7890b5475562
+    image: linuxserver/libreoffice:7.6.7@sha256:a62c7f094f2a7ed8145983d04f54ca80d85b557bbdda0f9aa784ccb6267b70e8
     restart: on-failure
     stop_grace_period: 1m
     environment:

libreoffice/umbrel-app.yml

@@ -2,30 +2,13 @@ manifestVersion: 1
 id: libreoffice
 category: files
 name: LibreOffice
-version: "7.2.7"
+version: "7.6.7"
 tagline: Do more - easier, quicker, smarter
 description: >-
   LibreOffice is a free and powerful office suite, and a successor to OpenOffice.org (commonly known as OpenOffice). Its clean interface and feature-rich tools help you unleash your creativity and enhance your productivity.
 
 
-  16,384 columns in Calc.
-  
-  Working with large amounts of data? Spreadsheets can now have up to 16,384 columns. Also, a new menu entry (Sheet ▸ Navigate ▸ Go to Sheet) helps with navigation.
-
-  
-  Better change tracking in Writer
-  
-  Tracked footnote insertions and deletions are now visible in the footnote area. In addition, Writer now can take advantage of the remote LanguageTool APIs for grammar checking.
-
-  
-  Document themes in presentations
-  
-  Impress now has initial document theme support. it is possible to define a document theme on master pages, and you can refer to the theme colours from shape text (including effects).
-
-  
-  And much more
-  
-  Performance boosts, compatibility improvements, and fixes. For a full list of new features in LibreOffice 7.4, see our release notes.
+  LibreOffice includes several applications that make it the most versatile Free and Open Source office suite on the market: Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (vector graphics and flowcharts), Base (databases), and Math (formula editing).
 developer:  The Document Foundation
 website: https://www.libreoffice.org/
 dependencies: []
@@ -43,4 +26,17 @@ defaultPassword: ""
 torOnly: false
 submitter: Pranshu Agrawal
 submission: https://github.com/getumbrel/umbrel-apps/pull/216
-releaseNotes: ""
+releaseNotes: >-
+  Key highlights in this release include:
+    - New page number wizard in Writer's Insert menu for easy one-step insertion of page numbers in headers/footers
+    - Improved paragraph style dropdown in Writer's Formatting toolbar
+    - Enhanced citation handling and bibliography features in Writer
+    - New Accessibility sidebar in Writer for easier document accessibility checks
+    - Improved table editing and change tracking in Writer
+    - New drawing styles for shapes and comments in Calc
+    - Enhanced number format support and sheet management in Calc
+    - Improved spell checking and proofreading options
+    - and much much more!
+
+
+  A full list of new features and improvements can be found at https://wiki.documentfoundation.org/ReleaseNotes/7.6.