Re-enable SonarCloud scanning.

Token is set up, and scanning from SonarCloud working for this repository.

.github/workflows/tests.yml

@@ -26,8 +26,8 @@ jobs:
         run: pytest --cov=. --cov-config=.coveragerc --cov-report xml:coverage.xml
       - name: Track master branch
         run: git fetch --no-tags https://$GITHUB_ACTOR:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY +refs/heads/main:refs/remotes/origin/main
-#      - name: SonarCloud scan
-#        uses: sonarsource/sonarcloud-github-action@master
-#        env:
-#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-#          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+      - name: SonarCloud scan
+        uses: sonarsource/sonarcloud-github-action@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}