Hints for otpclient in testing

Hints

• asv-id-tag-has-type
  :4 - com.github.paolostivanin.OTPClient.desktop
  The <id/> tag still contains a `type` property, probably from an old conversion to the recent metainfo format.
• asv-unknown-tag
  :63 - developer
  Found invalid tag. Non-standard tags should be prefixed with `x-`. AppStream also provides the <custom/> tag to add arbitrary custom data to metainfo files. This tag is read by AppStream libraries and may be useful instead of defining new custom toplevel or `x-`-prefixed tags if you just want to add custom data to a metainfo file.