fix: add chmod +x for sonar-scanner binary after jar extraction

jar xf doesn't preserve Unix file permissions from zip entries,
so the sonar-scanner binary lacks the execute bit.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/sonarqube.yml

@@ -67,6 +67,7 @@ jobs:
           esac
           curl -sSLo sonar-scanner.zip "https://binaries.sonarsource.com/Distribution/sonar-scanner-cli/sonar-scanner-cli-${SONAR_SCANNER_VERSION}-${PLATFORM}.zip"
           jar xf sonar-scanner.zip
+          chmod +x "sonar-scanner-${SONAR_SCANNER_VERSION}-${PLATFORM}/bin/sonar-scanner"
           ln -s "$(pwd)/sonar-scanner-${SONAR_SCANNER_VERSION}-${PLATFORM}/bin/sonar-scanner" /usr/local/bin/sonar-scanner
 
       - name: SonarQube Analysis