[github actions] reduce build fequency & use consecutive builds instead of parallel

.github/workflows/klipper_moonraker_multiarch.yml

@@ -6,11 +6,19 @@ on:
       - main
       - develop
   schedule:
-    - cron: "42 13 * * 0,2,5"
+    - cron: "42 13 * * 0"
 
 jobs:
+  consecutiveness:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: mktcode/consecutive-workflow-action@e2e008186aa210faacd68ec30f6ac236f7e2f435
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+
   docker:
     runs-on: ubuntu-latest
+    needs: [ consecutiveness ]
     steps:
       - name: Checkout
         uses: actions/checkout@v2