[3.12] gh-115146: Fix typo in pickletools.py documentation (GH-115148) (GH-115155)

(cherry picked from commit 4a7f638)

Co-authored-by: Justin Applegate <70449145+Legoclones@users.noreply.github.com>

Author: miss-islington

Lib/pickletools.py

@@ -1253,7 +1253,7 @@ def __init__(self, name, code, arg,
       stack_before=[],
       stack_after=[pyint],
       proto=2,
-      doc="""Long integer using found-byte length.
+      doc="""Long integer using four-byte length.
 
       A more efficient encoding of a Python long; the long4 encoding
       says it all."""),