[rb] update release date in change log

titusfortner · titusfortner · commit 866b4017e8a4 · 2023-12-23T12:55:21.000-06:00
diff --git a/rb/CHANGES b/rb/CHANGES
@@ -1,4 +1,4 @@
-4.16.0 (unreleased)
+4.16.0 (2023-12-06)
 =========================
 
 Ruby:
