Hints for yoshimi in main

Warnings

• metainfo-validation-issue
  Validation of the metainfo file found a problem: The component ID is not a reverse domain-name. Please update the ID and that of the accompanying .desktop file to follow the latest version of the Desktop-Entry and AppStream specifications and avoid future issues.
• metainfo-validation-issue
  Validation of the metainfo file found a problem: Found invalid tag: 'updatecontact'. Non-standard tags must be prefixed with "x-".