ci: add workflow for pushing stable tag

.github/workflows/run-obs.yml

@@ -4,18 +4,18 @@ on:
   workflow_dispatch:
     inputs:
       package:
-        description: 'Package to update (dms, dms-git, or all)'
+        description: "Package to update (dms, dms-git, or all)"
         required: false
-        default: 'all'
+        default: "all"
       rebuild_release:
-        description: 'Release number for rebuilds (e.g., 2, 3, 4 to increment spec Release)'
+        description: "Release number for rebuilds (e.g., 2, 3, 4 to increment spec Release)"
         required: false
-        default: ''
+        default: ""
   push:
     tags:
-      - 'v*'
+      - "v*"
   schedule:
-    - cron: '0 */3 * * *'  # Every 3 hours for dms-git builds
+    - cron: "0 */3 * * *" # Every 3 hours for dms-git builds
 
 jobs:
   check-updates:
@@ -260,7 +260,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.24'
+          go-version: "1.24"
 
       - name: Install OSC
         run: |

.github/workflows/run-ppa.yml

@@ -4,15 +4,15 @@ on:
   workflow_dispatch:
     inputs:
       package:
-        description: 'Package to upload (dms, dms-git, dms-greeter, or all)'
+        description: "Package to upload (dms, dms-git, dms-greeter, or all)"
         required: false
-        default: 'dms-git'
+        default: "dms-git"
       rebuild_release:
-        description: 'Release number for rebuilds (e.g., 2, 3, 4 for ppa2, ppa3, ppa4)'
+        description: "Release number for rebuilds (e.g., 2, 3, 4 for ppa2, ppa3, ppa4)"
         required: false
-        default: ''
+        default: ""
   schedule:
-    - cron: '0 */3 * * *'  # Every 3 hours for dms-git builds
+    - cron: "0 */3 * * *" # Every 3 hours for dms-git builds
 
 jobs:
   check-updates:
@@ -92,7 +92,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.24'
+          go-version: "1.24"
           cache: false
 
       - name: Install build dependencies

.github/workflows/stable.yml

@@ -0,0 +1,19 @@
+name: Update stable branch
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  update-stable:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Push to stable branch
+        run: git push origin HEAD:refs/heads/stable --force