[3.10] gh-99795: Fix typo in importlib.resources.abc (GH-99796) (GH-99800)

Changing TraversableReader to TraversableResources at one place of the documentation.

See GH-99795 for more details..
(cherry picked from commit 5f88982)

Co-authored-by: busywhitespace <[email protected]>

Co-authored-by: busywhitespace <[email protected]>

Author: jaraco

Doc/library/importlib.rst

@@ -862,7 +862,7 @@ ABC hierarchy::
     An abstract base class for resource readers capable of serving
     the ``files`` interface. Subclasses ResourceReader and provides
     concrete implementations of the ResourceReader's abstract
-    methods. Therefore, any loader supplying TraversableReader
+    methods. Therefore, any loader supplying TraversableResources
     also supplies ResourceReader.
 
     Loaders that wish to support resource reading are expected to