fix: announce action (#294)

Author: cmeesters

.github/workflows/announce-release.yml

@@ -19,7 +19,7 @@ jobs:
         uses: snakemake/mastodon-release-post-action@v1.2.3
         with:
           access-token: ${{ secrets.MASTODONBOT }}
-          pr-title: ${{ github.event.release.tag_name }}
+          pr-title: ${{ github.event.head_commit.message }}
           message: |
             Beep, Beep - I am your friendly #Snakemake release announcement bot.