Fix CI failure: Add package installation before running tests in publish.yml

Co-authored-by: pacnpal <183241239+pacnpal@users.noreply.github.com>

.github/workflows/publish.yml

@@ -27,6 +27,7 @@ jobs:
         pip install build
     - name: Run Pytest tests
       run: |
+        pip install .
         pip install pytest pytest-cov
         pytest --cov --cov-report=xml
     - name: Upload coverage reports to Codecov