Update quotes in commands-and-handlers example

Author: rmk135

examples/miniapps/commands-and-handlers/application/__main__.py

@@ -4,7 +4,7 @@
 from .commands import SaveRating, DoSomethingElse
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     container = Container()
     message_bus = container.message_bus()
 

examples/miniapps/commands-and-handlers/application/handler.py

@@ -8,7 +8,7 @@ def __init__(self, rating_repo: RatingRepository):
         self.rating_repo = rating_repo
 
     def save_rating(self):
-        print('Saving rating')
+        print("Saving rating")
 
     def something_else(self):
-        print('Doing something else')
+        print("Doing something else")