appdata file still doesn't validate properly

Hello,

With git HEAD, running appstreamcli validate on the appdata file still shows the following warnings:

W - inkscape.appdata.xml.in:org.inkscape.Inkscape:34
    Found tag '_caption' in a screenshot. Only <caption/> and <image/> tags are 
    allowed.

W - inkscape.appdata.xml.in:org.inkscape.Inkscape:66
    Found empty 'content_rating' tag.

Validation failed: warnings: 2, pedantic: 1