Update CHANGELOG.md

CHANGELOG.md

@@ -44,7 +44,7 @@ ENHANCEMENTS:
 * bigtable: Add multi-zone (inside one region) replication to `google_bigtable_instance`. [GH-2313] [GH-2289]
 * cloudbuild: Added Update support for `google_cloudbuild_trigger`.  [GH-2121]
 * cloudfunctions: Add `runtime` support to `google_cloudfunctions_function` [GH-2340]
-* cloudfunctions: Add new-style Storage and Pub/Sub trigger support to `google_cloudfunctions_function` [GH-2412]
+* cloudfunctions: Add new-style Storage and Pub/Sub trigger support as well as Firestore trigger support to `google_cloudfunctions_function` [GH-2412] [GH-2480]
 * compute: `google_compute_url_map` resource is now autogenerated and supports multiple import formats. [GH-2245]
 * dataproc: Add `accelerators` support to `google_dataproc_cluster` to allow using GPU accelerators. [GH-2411]
 * container: regional and private clusters are in GA now [GH-2364]