Correct config import.

Author: purple4reina

datadog_lambda/patch.py

@@ -12,7 +12,7 @@
 from wrapt.importer import when_imported
 from ddtrace import patch_all as patch_all_dd
 
-from datadog_lambda import config
+from datadog_lambda.config import config
 from datadog_lambda.tracing import get_dd_trace_context
 from collections.abc import MutableMapping