snap: switch ci action used to build snap

.github/workflows/ci.yml

@@ -55,7 +55,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: snapcore/action-build@v1
+      - uses: diddlesnaps/snapcraft-multiarch-action@v1
       - uses: actions/upload-artifact@v3
         with:
           name: snap