chore: add language identifiers

src/content/docs/apm/agents/python-agent/python-agent-api/recordcustomevent-python-agent-api.mdx

@@ -14,7 +14,7 @@ redirects:
 
 ## Syntax
 
-```
+```py
 newrelic.agent.record_custom_event(event_type, params, application=None)
 ```
 
@@ -96,23 +96,23 @@ None.
 
 Here's an example of recording a custom event associated with a background task:
 
-```
+```py
 @newrelic.agent.background_task() 
 def bg_task(): 
-	# do some type of work in this background task...
-	application = newrelic.agent.application()
-	newrelic.agent.record_custom_event('your_event_type', {'param1':'value1'}, application)
+    # do some type of work in this background task...
+    application = newrelic.agent.application()
+    newrelic.agent.record_custom_event('your_event_type', {'param1':'value1'}, application)
 ```
 
 ### Create a killed-query custom event [#event-example]
 
 An example of creating a killed-query custom event inside a database-logging function:
 
-```
+```PY
 application = newrelic.agent.register_application(timeout=10)
 
 def task_runner(): 
-	event_type = "Killed_Query" 
-	params = {'query_info':'select * from all_things;', 'killed_time': '2016-05-18 00:59:00', 'host': 'my_host'} 
-	newrelic.agent.record_custom_event(event_type, params, application=application)
+    event_type = "Killed_Query" 
+    params = {'query_info':'select * from all_things;', 'killed_time': '2016-05-18 00:59:00', 'host': 'my_host'} 
+    newrelic.agent.record_custom_event(event_type, params, application=application)
 ```