docs: Update mailgun and jira provider documentation snippets

Author: sanyo4ever

docs/snippets/providers/jira-snippet-autogenerated.mdx

@@ -61,6 +61,8 @@ actions:
 Check the following workflow examples:
 - [create_jira_ticket_upon_alerts.yml](https://github.com/keephq/keep/blob/main/examples/workflows/create_jira_ticket_upon_alerts.yml)
 - [incident-enrich.yaml](https://github.com/keephq/keep/blob/main/examples/workflows/incident-enrich.yaml)
+- [jira-create-ticket-on-alert.yml](https://github.com/keephq/keep/blob/main/examples/workflows/jira-create-ticket-on-alert.yml)
+- [jira-transition-on-resolved.yml](https://github.com/keephq/keep/blob/main/examples/workflows/jira-transition-on-resolved.yml)
 - [jira_on_prem.yml](https://github.com/keephq/keep/blob/main/examples/workflows/jira_on_prem.yml)
 - [test_jira_create_with_custom_fields.yml](https://github.com/keephq/keep/blob/main/examples/workflows/test_jira_create_with_custom_fields.yml)
 - [test_jira_custom_fields_fix.yml](https://github.com/keephq/keep/blob/main/examples/workflows/test_jira_custom_fields_fix.yml)

docs/snippets/providers/mailgun-snippet-autogenerated.mdx

@@ -6,6 +6,7 @@ This provider requires authentication.
 - **email**: Email address to send alerts to (required: False, sensitive: False)
 - **sender**: Sender email address to validate (required: False, sensitive: False)
 - **email_domain**: Custom email domain for receiving alerts (required: False, sensitive: False)
+- **api_region**: Mailgun API region (required: False, sensitive: False)
 - **extraction**: Extraction Rules (required: False, sensitive: False)