Update to ghcr.io/guysoft/custompios:devel

Author: guysoft

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Checkout CustomPiOS
       uses: actions/checkout@v2
       with:
-        repository: 'guysoft/CustomPiOS'
+        repository: 'ghcr.io/guysoft/custompios:devel'
         path: CustomPiOS
 
     - name: Checkout Project Repository