Do not run codacy on pull request

Author: ale94mleon

.github/workflows/tests.yml

@@ -58,7 +58,7 @@ jobs:
         pytest tests --cov moldrug --cov-report xml
     - name: Run codacy-coverage-reporter
       uses: codacy/codacy-coverage-reporter-action@v1.3.0
-      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.9'
+      if: github.event_name == 'push' && matrix.os == 'ubuntu-latest' && matrix.python-version == '3.9'
       with:
         project-token: ${{ secrets.CODACY_PROJECT_TOKEN }}
         coverage-reports: coverage.xml