meson: don't add sources files as a dependency to the gresource

This was causing issues when we build the app with the pkg.name set to the app-id
By following what is already done on Weather, this can be fixed by not adding those files as a dependency
3 jobs for <span class="ref-name">resources</span> in 3 minutes and 2 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #185997
flatpak

00:01:50

 
  Deploy
passed #185998
review

00:01:12

manual #185999
allowed to fail manual
stop_review