github: Add fediverse-action to workflows

This config file will post a default message on each push.

https://mastodon.social/tags/FediVerseAction

As explained in documentation token should be set in project's secrect.

Once checked config can be customized, eg: to post only on releases.

Then please share your updated config file to community:

https://github.com/rzr/fediverse-action#Community

Change-Id: I8323211f6b224b3fb1603c605416fc2a69d24be2
Origin: https://github.com/rzr/fediverse-action/blob/master/.github/workflows/fediverse-action.yml
Relate-to: https://github.com/rzr/fediverse-action/
Signed-off-by: Philippe Coval <rzr@users.sf.net>

.github/workflows/fediverse-action.yml

@@ -0,0 +1,11 @@
+# YAML
+---
+name: fediverse-action
+on: [push]
+jobs:
+  post:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: rzr/fediverse-action@master
+        with:
+          access-token: ${{ secrets.MASTODON_ACCESS_TOKEN }}