just use issue #

Author: Feiyang1

packages/database/CHANGELOG.md

@@ -1,4 +1,4 @@
 # Unreleased
-- [fixed] Fixed an issue where multi-byte UTF-8 characters would not be written correctly when using `firebase.js` or `firebase-database.js` (https://github.com/firebase/firebase-js-sdk/issues/2035).
+- [fixed] Fixed an issue where multi-byte UTF-8 characters would not be written correctly when using `firebase.js` or `firebase-database.js` (#2035).
 - [changed] Improved consistency between the type annotations for `Query.on`/`Reference.on`, 
   `Query.off`/`Reference.off` and `Query.once`/`Reference.once` (#1188, #1204).