feat(action): Use actions/checkout@v7, add repository and ref inputs

.forgejo/workflows/demo.yaml

@@ -7,9 +7,13 @@ jobs:
   dotnet:
     runs-on: docker
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
+        with:
+          repository: "pascal_nulah/Nulah.PowerShell"
+          ref: "feature/forgejo-runner-and-actions"
+
       - id: dotnet-build
-        uses: ./.forgejo/dotnet-build@feature/forgejo-runner-and-actions'
+        uses: ./.forgejo/dotnet-build'
         # with:
         #   input-two-required: "two"
       - run: test "${{ steps.dotnet-build.outputs.key }}" = "two"