This fixes the following warnings in `appstreamcli validate`: W: org.gnome.Calls:239: description-spurious-text The description element contains raw text that is not in any paragraph or other permitted tag. This is not allowed and the additional text may be ignored by parsers or raise errors. W: org.gnome.Calls:239: description-no-valid-content The description element does not contain any valid content (paragraphs, enumerations, etc.). Signed-off-by: Evangelos Ribeiro Tzaras <devrtz@fortysixandtwo.eu> Part-of: <https://gitlab.gnome.org/GNOME/calls/-/merge_requests/781>