Adjust changelog wording

Author: NoahStapp

doc/changelog.rst

@@ -10,7 +10,7 @@ PyMongo 4.12 brings a number of changes including:
   :class:`~pymongo.encryption_options.AutoEncryptionOpts`.
 - Support for $lookup in CSFLE and QE supported on MongoDB 8.1+.
 - Added :meth:`gridfs.asynchronous.grid_file.AsyncGridFSBucket.rename_by_name` and :meth:`gridfs.grid_file.GridFSBucket.rename_by_name`
-  for more performant renaming of file revisions.
+  for more performant renaming of a file with multiple revisions.
 - AsyncMongoClient no longer performs DNS resolution for "mongodb+srv://" connection strings on creation.
   To avoid blocking the asyncio loop, the resolution is now deferred until the client is first connected.
 - Added index hinting support to the