fix: remove semicolons from some python statements (#7582)

Author: matt-codecov

src/platform-includes/performance/custom-performance-metrics/python.mdx

@@ -14,13 +14,13 @@ To capture in the SDK:
 from sentry_sdk import set_measurement
 
 # Record amount of memory used
-set_measurement('memory_used', 123, 'byte');
+set_measurement('memory_used', 123, 'byte')
 
 # Record time when job was started
-set_measurement('job_start_time', 1.3, 'second');
+set_measurement('job_start_time', 1.3, 'second')
 
 # Record amount of times cache was read
-set_measurement('cache_read_count', 4);
+set_measurement('cache_read_count', 4)
 ```
 
 The feature was marked experimental between versions `1.5.12` and `1.16.0`.
@@ -41,5 +41,5 @@ sentry_sdk.init(
 transaction = Hub.current.scope.transaction
 
 if transaction:
-    transaction.set_measurement('memory_used', 123, 'byte');
+    transaction.set_measurement('memory_used', 123, 'byte')
 ```