Firestore/CHANGELOG.md: add PR number

dconeybe · dconeybe · commit d55fa7772801 · 2022-05-24T22:54:54.000-04:00
diff --git a/Firestore/CHANGELOG.md b/Firestore/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Unreleased
 - [feature] Added the ability to specify the maximum number of attempts to
-  execute a transaction (#XXXXXXXXXXXXX)
+  execute a transaction (#9838)
 
 # 9.0.0
 - [fixed] Fixed CMake build errors when building with Xcode 13.3.1 (#9702).
