chore: Update ChangeLog

- Remove duplicated entries from last release

ChangeLog

@@ -4,8 +4,6 @@ Gajim 1.4.7 (24 Jul 2022)
 
   * Startup: Show hint in console if Gajim is already running (#11039)
   * Preview: Add setting to disable file preview (#10991)
-  * Roster: Display show value in tooltip (#11010)
-  * ChatActionProcessor: Improve detection of emoji shortcode start
 
   Performance
 
@@ -20,17 +18,6 @@ Gajim 1.4.7 (24 Jul 2022)
   * Preview: Allow manual download for all mime types (#11044)
   * GroupchatInfo: Don’t set subject when loading from disco info (#11040)
   * Preview: Hide download hint if we sent the file (#11036)
-  * Flatpak: Fix display of tray icon using libappindicator (#10869)
-  * Remote: Console scripts need a method as entry point (#11034)
-  * CodeWidget: Don’t default to python for highlighting (#11012)
-  * ContactInfo: Preserve groups when changing contact name (#11028)
-  * CodeWidget: Don't highlight matching brackets (#11026)
-  * StatusIcon: Don’t lose new message icon on state change (#11013)
-  * GtkStatusIcon: Always show when Gajim has not toplevel focus
-  * GroupChatNickCompletion: Only process Tab press
-  * Notifications: Change Gdk window hints on Windows (#11008)
-  * MessageRow: Align name label correctly
-  * StatusIcon: Fix logic error on activate
 
 Gajim 1.4.6 (07 Jul 2022)