Update gitlab.md

Signed-off-by: fortishield <161459699+FortiShield@users.noreply.github.com>

docs/docs/installation/gitlab.md

@@ -38,7 +38,7 @@ You can also modify the `script` section to run different PR-Insight commands, o
 
 Note that if your base branches are not protected, don't set the variables as `protected`, since the pipeline will not have access to them.
 
-
+> **Note**: The `$CI_SERVER_FQDN` variable is available starting from GitLab version 16.10. If you're using an earlier version, this variable will not be available. However, you can combine `$CI_SERVER_HOST` and `$CI_SERVER_PORT` to achieve the same result. Please ensure you're using a compatible version or adjust your configuration.
 
 ## Run a GitLab webhook server
 
@@ -74,4 +74,4 @@ docker push khulnasoft/pr-insight:gitlab_webhook  # Push to your Docker reposito
 6. Create a webhook in GitLab. Set the URL to ```http[s]://<PR_INSIGHT_HOSTNAME>/webhook```, the secret token to the generated secret from step 2, and enable the triggers `push`, `comments` and `merge request events`.
 
 7. Test your installation by opening a merge request or commenting on a merge request using one of KhulnaSoft's commands.
-boxes
+boxes