changelog: update

[skip ci]

CHANGELOG.md

@@ -31,8 +31,7 @@
 * **Elasticsearch**: For alerting/backend, support having index name to the right of pattern in index pattern [#12731](https://github.com/grafana/grafana/issues/12731)
 * **OAuth**: Fix overriding tls_skip_verify_insecure using environment variable [#12747](https://github.com/grafana/grafana/issues/12747), thx [@jangaraj](https://github.com/jangaraj)
 * **Units**: Change units to include characters for power of 2 and 3 [#12744](https://github.com/grafana/grafana/pull/12744), thx [@Worty](https://github.com/Worty)
-* **Graph**: Option to hide series from tooltip [#3341](https://github.com/grafana/grafana/pull/3341), thx [@mtanda](https://github.com/mtanda)
-
+* **Graph**: Option to hide series from tooltip [#3341](https://github.com/grafana/grafana/issues/3341), thx [@mtanda](https://github.com/mtanda)
 
 # 5.2.2 (2018-07-25)