Hints for clazy in main

Errors

• metainfo-parsing-error
  Unable to parse AppStream MetaInfo file org.kde.clazy.metainfo.xml, the data is likely malformed.
  Error: Could not parse XML data: Entity: line 2842: parser error : Opening and ending tag mismatch: release line 164 and releases ^ Entity: line 2843: parser error : Opening and ending tag mismatch: releases line 142 and component ^ Entity: line 2844: parser error : Premature end of data in tag component line 2 ^