[3.13] gh-139495: Fix `hashlib.file_digest()` versionchanged description of `BlockingIOError` (GH-139496) (#139528)
* Fix `hashlib.file_digest()` versionchanged description of `BlockingIOError`
The sentence was missing a negation and contradicted the other two
descriptions in the same commit. I believe code behaviour is correct.
* fixup! Fix `hashlib.file_digest()` versionchanged description of `BlockingIOError`
* Remove unncessary NEWS.d entry
(cherry picked from commit
fb114cf49742a3679d56aa4ac3f341839c641221)