docs: Output file option with GitLab integration (#21706)

Co-authored-by: Micha Reiser <micha@reiser.io>

Author: kieran-ryan

docs/integrations.md

@@ -88,7 +88,7 @@ You can add the following configuration to `.gitlab-ci.yml` to run a `ruff forma
 Ruff Check:
   extends: .base_ruff
   script:
-    - ruff check --output-format=gitlab > code-quality-report.json
+    - ruff check --output-format=gitlab --output-file=code-quality-report.json
   artifacts:
     reports:
       codequality: $CI_PROJECT_DIR/code-quality-report.json