Updating reference to PR in Pub / Sub changelog.

I marked it as `XYZ` because I wanted to refer to that PR before I had created it.
googleapis · Dec 8, 2017 · 675d4f0 · 675d4f0
1 parent eed6a1e
commit 675d4f0
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pubsub/CHANGELOG.md b/pubsub/CHANGELOG.md
@@ -37,7 +37,7 @@
 - Upgrading `google-api-core` dependency to latest revision (`0.1.2`)
   since we rely on the latest version of the `concurrent.futures` backport
   to provide the `thread_name_prefix` argument for thread pool
-  executor (#4521, #XYZ).
+  executor (#4521, #4559).
 
 PyPI: https://pypi.org/project/google-cloud-pubsub/0.29.3/