small code snippet fix

Author: antonpirker

docs/platforms/python/feature-flags/index.mdx

@@ -27,7 +27,7 @@ users to integrate with proprietary (or otherwise unsupported) feature flagging
 solutions.  **At the moment, we only support boolean flag evaluations.**
 
 ```python
-from sentry_sdk.integrations.feature_flags import add_feature_flag
+from sentry_sdk.feature_flags import add_feature_flag
 
 add_feature_flag('test-flag', False)  # Records an evaluation and its result.