Update CHANGES.md

Author: hashhar

CHANGES.md

@@ -19,7 +19,7 @@ and the [PyPI page](https://pypi.org/project/trino/).
   ([#551](https://github.com/trinodb/trino-python-client/pull/551))
 * Use default TLS port when URI scheme is `https`.
   ([#549](https://github.com/trinodb/trino-python-client/pull/549))
-* Flush redirect URI during OAuth authentication.
+* Fix redirect URI not getting printed during OAuth authentication when using terminals that buffer output.
   ([#548](https://github.com/trinodb/trino-python-client/pull/548))
 * Use TLS verification mode set on the connection when retrieving spooled results.
   ([#546](https://github.com/trinodb/trino-python-client/pull/546))