chore: add language identifiers

src/content/docs/apm/agents/python-agent/custom-instrumentation/python-custom-instrumentation-config-file.mdx

@@ -24,9 +24,9 @@ To extend instrumentation to designated functions and class methods, add them to
     id="dumdbm-example"
     title="Using dumbdbm"
   >
-    In this example, you use the Python **dumbdbm** module and want to instrument the time it took to open a database, and then to write that database back to a file. In this case you would use:
+    In this example, you use the Python **`dumbdbm`** module and want to instrument the time it took to open a database, and then to write that database back to a file. In this case you would use:
 
-    ```
+    ```ini
     transaction_tracer.function_trace = dumbdbm:open
                                                    dumbdbm:_Database._commit
     ```
@@ -48,14 +48,14 @@ When wrapping functions by listing them in the agent configuration file, you can
 
 When using the `transaction_tracer.function_trace` setting in the agent configuration file, the name of the function will be used in the metric name, with it being classified as a `Function`. If it is necessary to override what function name may be used in the metric name or classify it differently, then an alternate means of defining the function trace in the configuration file can be used. The equivalent for:
 
-```
+```ini
 transaction_tracer.function_trace = dumbdbm:open
                                                dumbdbm:_Database._commit
 ```
 
 would be to create two new configuration sections in the agent configuration file, one for each function to be traced:
 
-```
+```ini
 [function-trace:dumbdbm-1]
 enabled = true
 function = dumbdbm:open