Bump SonarSource/sonarqube-scan-action from 5 to 6 in /.github/workflows

Bumps [SonarSource/sonarqube-scan-action](https://github.com/sonarsource/sonarqube-scan-action) from 5 to 6.
- [Release notes](https://github.com/sonarsource/sonarqube-scan-action/releases)
- [Commits](SonarSource/sonarqube-scan-action@v5...v6)

---
updated-dependencies:
- dependency-name: SonarSource/sonarqube-scan-action
  dependency-version: '6'
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -32,6 +32,6 @@ jobs:
           path: ${{ github.workspace }}/build/mtxpc.phar
 
       - name: SonarQube Scan
-        uses: SonarSource/sonarqube-scan-action@v5
+        uses: SonarSource/sonarqube-scan-action@v6
         env:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}