Merge branch 'docs-typo-fix' into 'master'

Fixed minor typo, plural instead of singular

See merge request gitlab-org/gitlab!76578

doc/integration/index.md

@@ -46,7 +46,7 @@ GitLab has integrated with several security partners. For more information, see
 
 ## Continuous integration
 
-GitLab can be integrated with the following external service for continuous integration:
+GitLab can be integrated with the following external services for continuous integration:
 
 - [Jenkins](jenkins.md) CI.
 - [Datadog](datadog.md), to monitor for CI/CD job failures and performance issues.