Add missing changelog type to docs

changelogs/unreleased/blackst0ne-add-missing-changelog-type-to-docs.yml

+---
+title: Add missing changelog type to docs
+merge_request: 18526
+author: "@blackst0ne"
+type: other

doc/development/changelog.md

@@ -22,7 +22,7 @@ The `merge_request` value is a reference to a merge request that adds this
 entry, and the `author` key is used to give attribution to community
 contributors. **Both are optional**.
 The `type` field maps the category of the change,
-valid options are: added, fixed, changed, deprecated, removed, security, other. **Type field is mandatory**.
+valid options are: added, fixed, changed, deprecated, removed, security, performance, other. **Type field is mandatory**.
 
 Community contributors and core team members are encouraged to add their name to
 the `author` field. GitLab team members **should not**.