Limit beta's webhook to test-branches only

.github/workflows/build.yml

@@ -42,11 +42,11 @@ jobs:
       - name: Send status to Discord
         uses: stegzilla/discord-notify@v2
         with:
-          webhook_url: ${{ secrets.discord_webhook_betas }} # required
+          webhook_url: ${{ secrets.discord_webhook_betas }}
           title: "Build #${{ github.run_number }} available!"
-          message: "**Download link:\n** 
+          message: "**Branch:** ${{ github.ref_name }}\n**Download link:\n** 
           https://github.com/dcs-retribution/dcs-retribution/actions/runs/${{ github.run_id }}"
           include_image: true
           avatar_url: https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png
           username: GitHub Build Notifier
-        if: success() # or failure() or success()
+        if: startsWith(github.ref_name, 'test')