don't accidentally run bundle tests

Author: jepler

.github/workflows/build.yml

@@ -49,7 +49,7 @@ jobs:
         cd CircuitPython_Community_Bundle
         circuitpython-build-bundles --filename_prefix test-bundle --library_location libraries --library_depth 2
     - name: Munge tests
-      run: pytest
+      run: pytest tests
     - name: Build Python package
       run: |
         pip install --upgrade setuptools wheel twine readme_renderer testresources