Update Admin Tools Template to Improve JSON Placeholder Formatting

- Simplified the JSON placeholder in the webhook payload textarea for better readability and usability.

components/admin_tools.templ

@@ -653,12 +653,7 @@ templ AdminTools(ctx context.Context, data AdminToolsData) {
 											name="webhook_payload" 
 											rows="5" 
 											class="form-textarea w-full font-mono text-sm" 
-											placeholder='{
-											"event_type": "job_execution",
-											"job_id": 123,
-											"job_name": "Test Job",
-											"status": "completed"
-											}'></textarea>
+											placeholder='{"event_type": "job_execution","job_id": 123,"job_name": "Test Job","status": "completed"}'></textarea>
 										<p class="mt-1 text-xs text-secondary-500 dark:text-secondary-400">
 											<i class="fas fa-info-circle mr-1"></i>
 											Leave empty to use default test payload