Update source/release-notes.txt

Co-authored-by: Ashley Brown <[email protected]>

Author: sarah-olson-mongodb

source/release-notes.txt

@@ -17,7 +17,7 @@ Release Notes
 
 New features:
 
-- Support for connecting to a SQL Server Named Instance.
+- Support for connecting to a SQL Server named instance.
 - Collection names now show for JSON schema files created from the :guilabel:`Code Generation` screen.
 
 Bug fixes: