Fix incorrect repository for targeting composite action

This leaked in from my testing repository by mistake.

.github/workflows/pytest.yaml

@@ -50,6 +50,6 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
-      - uses: cottsay/colcon-ci@main
+      - uses: ${{ inputs.setup-repository }}@main
       - uses: codecov/codecov-action@v3
         if: ${{ inputs.codecov }}