appstream: use new id without hyphen

"Using a hyphen is strongly discouraged [...]" as by newer validator.

See also:

• warning: https://www.freedesktop.org/software/appstream/docs/chap-Validation.html#asv-cid-rdns-contains-hyphen
• <replaces> tag: https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#tag-replaces

@heikobecker @aacid @mwolff