[rb] update changelog

Author: titusfortner

rb/CHANGES

@@ -1,3 +1,16 @@
+4.9.1 (Unreleased)
+=========================
+Ruby:
+  * Allow users to specify driver process output in Service class (#11964)
+  * Updated minimum required Ruby version to 3.0
+  * Selenium Logger defaults to :info and all debugging is now logged as :debug (#11967)
+  * Every logging entry can be ignored based on ID, not just warnings
+  * Logging entries can be filtered to allow or ignore specific IDs
+
+BiDi:
+  * Fix bug with loading devtools (#11931) (thanks Boris Petrov!)
+  * Released selenium-devtools 0.113.0 (supports CDP v85, v111, v112, v113)
+
 4.9.0 (2023-04-21)
 =========================
 Ruby: