CI: Fix wildcard usage in wheel installation.

Author: scoder

.github/workflows/ci.yml

@@ -115,7 +115,7 @@ jobs:
 
     - name: Run tests
       run: |
-        python -m pip install dist/lupa-*.whl
+        bash -c "python -m pip install dist/lupa-*.whl"
         python -m lupa.tests.__main__
       continue-on-error: ${{ contains(matrix.python-version, 'pypy') }}