Update firebase-messaging/CHANGELOG.md

Co-authored-by: Rodrigo Lazo <rlazo@users.noreply.github.com>

Author: eldhosembabu

firebase-messaging/CHANGELOG.md

@@ -1,7 +1,7 @@
 # Unreleased
 
-- [feature] Added support for FCM registration using Firebase Installation ID
-- [deprecated] Existing getToken, deleteToken, onNewToken api(s) are deprecated
+- [feature] Added support for FCM registration using Firebase Installation ID (#8087)
+- [deprecated] Existing getToken, deleteToken, onNewToken api(s) are deprecated (#8087)
 
 # 25.0.2