[TA] fix typing in sample (Azure#29007)

* fix typing in sample

* update readme snippts with script

Author: kristapratico

sdk/textanalytics/azure-ai-textanalytics/README.md

@@ -322,7 +322,7 @@ reviews = [
 
 result = text_analytics_client.recognize_entities(reviews)
 result = [review for review in result if not review.is_error]
-organization_to_reviews: typing.Dict[str, list[str]] = {}
+organization_to_reviews: typing.Dict[str, typing.List[str]] = {}
 
 for idx, review in enumerate(result):
     for entity in review.entities:

sdk/textanalytics/azure-ai-textanalytics/samples/async_samples/sample_recognize_entities_async.py

@@ -52,7 +52,7 @@ async def sample_recognize_entities_async() -> None:
         result = await text_analytics_client.recognize_entities(reviews)
 
     result = [review for review in result if not review.is_error]
-    organization_to_reviews: typing.Dict[str, list[str]] = {}
+    organization_to_reviews: typing.Dict[str, typing.List[str]] = {}
 
     for idx, review in enumerate(result):
         for entity in review.entities:

sdk/textanalytics/azure-ai-textanalytics/samples/sample_recognize_entities.py

@@ -48,7 +48,7 @@ def sample_recognize_entities() -> None:
 
     result = text_analytics_client.recognize_entities(reviews)
     result = [review for review in result if not review.is_error]
-    organization_to_reviews: typing.Dict[str, list[str]] = {}
+    organization_to_reviews: typing.Dict[str, typing.List[str]] = {}
 
     for idx, review in enumerate(result):
         for entity in review.entities: