Bump SonarSource/sonarqube-scan-action from 7 to 8

Bumps [SonarSource/sonarqube-scan-action](https://github.com/sonarsource/sonarqube-scan-action) from 7 to 8.
- [Release notes](https://github.com/sonarsource/sonarqube-scan-action/releases)
- [Commits](SonarSource/sonarqube-scan-action@v7...v8)

---
updated-dependencies:
- dependency-name: SonarSource/sonarqube-scan-action
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/proxy-ci.yml

@@ -52,7 +52,7 @@ jobs:
         run: go test -tags testing -coverprofile=coverage.out -covermode=atomic ./...
 
       - name: SonarCloud Scan
-        uses: SonarSource/sonarqube-scan-action@v7
+        uses: SonarSource/sonarqube-scan-action@v8
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}