[3.14] pythongh-139495: Fix hashlib.file_digest() versionchanged description of BlockingIOError (pythonGH-139496) (python#139522)

Co-authored-by: Alex Willmer <[email protected]>

Author: miss-islington

Doc/library/hashlib.rst

@@ -303,7 +303,7 @@ a file or file-like object.
    .. versionadded:: 3.11
 
    .. versionchanged:: 3.14
-      Now raises a :exc:`BlockingIOError` if the file is opened in blocking
+      Now raises a :exc:`BlockingIOError` if the file is opened in non-blocking
       mode. Previously, spurious null bytes were added to the digest.