Fix provider documentation (#440)

sonthonaxrk · rmk135 · commit 9ed13a402332 · 2021-03-30T13:59:06.000-06:00
Make example more realistic.  This would break if you're running flask with multiple threads.
diff --git a/examples/providers/singleton_scoped.py b/examples/providers/singleton_scoped.py
@@ -10,7 +10,7 @@ class Service:
 
 class Container(containers.DeclarativeContainer):
 
-    service_provider = providers.Singleton(Service)
+    service_provider = providers.ThreadLocalSingleton(Service)
 
 
 def index_view():
