use newest release-notifier action (#15)

Author: neoscie

.github/workflows/notify-slack.yml

@@ -8,7 +8,9 @@ jobs:
   notify:
     runs-on: ubuntu-latest
     steps:
-      - uses: neolution-ch/action-release-notifier@v1
+      - uses: neolution-ch/action-release-notifier@v1.3.0
         with:
           slack-token: ${{ secrets.SLACK_RELEASE_NOTIFIER_TOKEN }}
           slack-channel-ids: ${{ vars.SLACK_CHANNEL_ID_RELEASE_ANNOUNCEMENTS }}
+          ignore-alpha-releases: true
+          ignore-rc-releases: true