Update CHANGELOG.md

Author: brizental

CHANGELOG.md

@@ -5,6 +5,7 @@
 * [#1233](https://github.com/mozilla/glean.js/pull/1233): Add optional `buildDate` argument to `initialize` configuration. The build date can be generated by glean_parser.
 * [#1233](https://github.com/mozilla/glean.js/pull/1233): Update glean_parser to version 5.1.0.
 * [#1217](https://github.com/mozilla/glean.js/pull/1217): Record `InvalidType` error when incorrectly type values are passed to metric recording functions.
+* [#1267](https://github.com/mozilla/glean.js/pull/1267): Implement the 'events' ping.
 
 # v0.32.0 (2022-03-01)