Fix link reference for GitLab in static analysis setup (#31987)

Co-authored-by: Heston Hoffman <[email protected]>

Author: michaelcretzman

content/en/security/code_security/static_analysis/setup/_index.md

@@ -25,7 +25,7 @@ To set up Datadog SAST in-app, navigate to [**Security** > **Code Security**][1]
 
 You can run Datadog Static Code Analysis (SAST) scans directly on Datadog infrastructure. Supported repository types include:
 - [GitHub][18] (excluding repositories that use [Git Large File Storage][17])
-- [GitLab.com and GitLab Self-Managed][18]
+- [GitLab.com and GitLab Self-Managed][20]
 - [Azure DevOps][19]
 
 To get started, navigate to the [**Code Security** page][1].
@@ -707,4 +707,5 @@ Datadog stores findings in accordance with our [Data Rentention Periods](https:/
 [16]: https://www.first.org/cvss/
 [17]: https://docs.github.com/en/repositories/working-with-files/managing-large-files/about-git-large-file-storage
 [18]: /security/code_security/static_analysis/setup/?tab=github#select-your-source-code-management-provider
-[19]: /security/code_security/static_analysis/setup/?tab=azuredevops#select-your-source-code-management-provider
+[19]: /security/code_security/static_analysis/setup/?tab=azuredevops#select-your-source-code-management-provider
+[20]: /security/code_security/static_analysis/setup/?tab=gitlab#select-your-source-code-management-provider