Add worfklow_dispatch trigger
Add worfklow_dispatch trigger

This change allows us to trigger integration tests manually.

beetbox/beets,shamangeorge/beets,shamangeorge/beets,shamangeorge/beets,sampsyo/beets,ibmibmibm/beets,ibmibmibm/beets,beetbox/beets,ibmibmibm/beets,beetbox/beets,jackwilsdon/beets,beetbox/beets,ibmibmibm/beets,sampsyo/beets,jackwilsdon/beets,sampsyo/beets,jackwilsdon/beets,shamangeorge/beets,jackwilsdon/beets,sampsyo/beets