bpo-45680: Minor formatting fix in stdtypes.rst (GH-30690)

Makes quotation consistent with rest of docs in commit 0eae9a2a2db6cc5a72535f61bb988cc417011640.
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index f97e7c2..3465320 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -5063,7 +5063,7 @@
    :pep:`484` - Type Hints
       Introducing Python's framework for type annotations.
 
-   :pep:`585` - "Type Hinting Generics In Standard Collections"
+   :pep:`585` - Type Hinting Generics In Standard Collections
       Introducing the ability to natively parameterize standard-library
       classes, provided they implement the special class method
       :meth:`~object.__class_getitem__`.