Bump SonarSource/sonarqube-scan-action from 5 to 6 in /.github/workflows (#776)

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
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/tests.yaml

@@ -238,7 +238,7 @@ jobs:
             VERSION="$(git describe --tags --abbrev=0 | sed 's/^v//')+$(git rev-parse --short HEAD)"
           fi
           echo "VERSION=$VERSION" >> $GITHUB_ENV
-      - uses: SonarSource/sonarqube-scan-action@v5
+      - uses: SonarSource/sonarqube-scan-action@v6
         with:
           args: >
             -Dsonar.organization=omni-us