appdata: add content_rating

1 job for !27 with gen-appdata-rel in 3 minutes and 18 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
failed #3692
linux kf5-qt5 qt5.10


Name Stage Failure
linux kf5-qt5 qt5.10 Build
  target, or an ALIAS target is missing?

-- Generating done
-- Build files have been written to: /builds/eszlari/kdenlive/build
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1