pythongh-89313: Add hashlib.file_digest to whatsnew 3.11 (pythonGH-95965)

Automerge-Triggered-By: GH:pablogsal
(cherry picked from commit 0b329f4)

Co-authored-by: Christian Heimes <[email protected]>

Author: tiran

Doc/whatsnew/3.11.rst

@@ -592,6 +592,10 @@ hashlib
   OpenSSL support.
   (Contributed by Christian Heimes in :issue:`47098`.)
 
+* Add :func:`hashlib.file_digest`, a helper function for efficient hashing
+  of files or file-like objects.
+  (Contributed by Christian Heimes in :gh:`89313`.)
+
 IDLE and idlelib
 ----------------