DOC: attribute PyPy for the idea behind LOAD_ATTR cache (GH-23036)

Co-authored-by: Pablo Galindo <[email protected]>

Author: mattip

Doc/whatsnew/3.10.rst

@@ -261,7 +261,7 @@ Optimizations
 
 * The ``LOAD_ATTR`` instruction now uses new "per opcode cache" mechanism.
   It is about 36% faster now.  (Contributed by Pablo Galindo and Yury Selivanov
-  in :issue:`42093`.)
+  in :issue:`42093`, based on ideas implemented originally in PyPy and MicroPython.)
 
 * When building Python with ``--enable-optimizations`` now
   ``-fno-semantic-interposition`` is added to both the compile and link line.