Update SonarQube scan action version in CI workflow

Author: florian-huber

.github/workflows/CI_build.yml

@@ -38,12 +38,12 @@ jobs:
       - name: Check whether import statements are used consistently
         shell: bash -l {0}
         run: poetry run isort --check-only --diff --conda-env spec2vec-dev .
-#      - name: SonarQube Scan
-#        if: github.repository == 'iomega/spec2vec'
-#        uses: SonarSource/sonarqube-scan-action@master
-#        env:
-#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-#          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+      - name: SonarQube Scan
+        if: github.repository == 'iomega/spec2vec'
+        uses: SonarSource/sonarqube-scan-action@v6
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
 
   build_pypi:
     name: Pypi and documentation build / python-${{ matrix.python-version }} / ${{ matrix.os }}