Fix de_DE.po header
Fix the complaint below, shown when executing the test:
po/de_DE.po:8: warning: header field 'Project-Id-Version' missing in header
Task: T6292
🟡 v2023.5 entered Soft Feature Freeze, no additional features will be accepted • schedule
Fix the complaint below, shown when executing the test:
po/de_DE.po:8: warning: header field 'Project-Id-Version' missing in header
Task: T6292