Refactor GitLab webhook script section for clarity and formatting (#447)

* Refactor GitLab webhook script section for clarity and formatting

* Clarify comments in gitlab-webhook.sh regarding PAT usage examples

* Clarify description of the webhook script usage in GitLab documentation

* Fix formatting for selecting triggers in GitLab webhook documentation

Author: hasit

docs/self-hosted/gitlab.md

@@ -37,19 +37,25 @@ Consult official CodeRabbitAI documentation for a detailed [guide](https://docs.
 1. **Navigate to Add Webhook Page**: Go to the webhook configuration page in the desired GitLab project.
 2. **Add Webhook URL**: Enter the URL pointing to the CodeRabbit service, followed by `/gitlab_webhooks` (e.g., `http://127.0.0.1:8080/gitlab_webhooks`).
 3. **Generate and Save Secret Token**: Generate a secret token, add it to the webhook, and store it securely. This will be needed for the `.env` file as `GITLAB_WEBHOOK_SECRET` (you can use a single secret token for all projects).
-4. Select triggers:
+4. **Select triggers**:
 
    - Push events
    - Comments
    - Issues events
    - Merge request events
 
-We have a convenient [script](/code/gitlab-webhook.sh) to help you add webhooks to all projects in a GitLab instance. You can run it with the following command:
+## Add Webhook Using a Script
+
+We have a convenient [script](/code/gitlab-webhook.sh) to help you add webhooks to a project or all projects under a group in a GitLab instance.
 
 ```bash
 # Make sure the script is executable:
 chmod +x gitlab-webhook.sh
+```
 
+Example usage:
+
+```bash
 # PAT example (header auto-detected)
 export GITLAB_TOKEN="glpat-xxxxx"
 ./gitlab-add-webhook.sh \

static/code/gitlab-webhook.sh

@@ -7,13 +7,13 @@
 # Make sure the script is executable:
 # chmod +x gitlab-webhook.sh
 
-# PAT example (header auto-detected)
+# PAT auto-detected header
 # export GITLAB_TOKEN="glpat-xxxxx"
 # ./gitlab-add-webhook.sh \
 #   -h "gitlab.example.com" -u "https://ci.example.com/gitlab-hook" \
 #   -s "mySecret" -p 42
 
-# PAT example (explicit header)
+# PAT with explicit header
 # ./gitlab-add-webhook.sh \
 #   -h "gitlab.example.com" -u "https://ci.example.com/gitlab-hook" \
 #   -s "mySecret" -g "mygroup/mysubgroup/myproject" \