Bump cbrgm/mastodon-github-action to v2 (#635)

And update parameters accordingly

Author: GeckoEidechse

.github/workflows/post-to-mastodon.yml

@@ -9,9 +9,8 @@ jobs:
     steps:
       - name: Send toot to Mastodon
         id: mastodon
-        uses: cbrgm/mastodon-github-action@v1
+        uses: cbrgm/mastodon-github-action@v2
         with:
           message: "We just released Northstar ${{ github.event.release.tag_name }}\n\n${{ github.event.release.html_url }}"
-        env:
-          MASTODON_URL: ${{ secrets.MASTODON_URL }}
-          MASTODON_ACCESS_TOKEN: ${{ secrets.MASTODON_ACCESS_TOKEN }}
+          url: ${{ secrets.MASTODON_URL }}
+          access-token: ${{ secrets.MASTODON_ACCESS_TOKEN }}