Add workflow to update mamolinux/stable branch

Author: hsbasu

.github/workflows/update-stable.yml

@@ -0,0 +1,31 @@
+# Automatically fetch and merge the master branch for new stable releases
+name: Update stable branch
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push events but only for new tags
+  push:
+    tags:
+      - "*.*.*"
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "sync-new-release"
+  sync-new-release:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+    
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@master
+        with:
+          fetch-depth: 0
+      
+      - name: Update mamolinux/stable for new release
+        uses: devmasx/merge-branch@master
+        with:
+          type: now
+          from_branch: master
+          target_branch: mamolinux/stable
+          github_token: ${{ github.token }}