chore: bump submodules

[jokeyrhyme]

• ran git submodule foreach --recursive 'git fetch; git pull origin master;'
• I think cosmic-applets had a rebase or something, as the current submodule reference was in a weird state, but that could just be me (and this PR fixes it anyhow)
• mostly motivated to get https://github.com/pop-os/cosmic-settings/commit/a8020c5261decaed29e3c503770303df13340f31 in to confirm that the builds are fixed