Update git submodules

• Update extensions/ContentTranslation from branch 'wmf/1.29.0-wmf.7'
  • Workaround to fix restoration for truncated section ids
    
    What this does not solve is:
    • Saving failures if strict mode enabled
    • Data loss if two sections have unique prefix when truncated
      
      What this solves:
    • Using the correct id to match sections during restoration
    • The restoration code to handle the weirds ids by not using $( '#' + uncontrolled input ) as selector. Replaced with document.getElementById or [id="uncontrolled input"].
      
      I changed test cases to use unique ids to make debugging easier. Also, setting the source revision id avoids JavaScript error that masks a real test failure.
      
      Bug: T154279 Change-Id: Ibc8d67b6ac6ff0947e5519db26b3666620d7d114 (cherry picked from commit b21908bf2d0f4cd946cef8b78f8fa5c46eae9104)