Correct changelog reference

changelogs/unreleased/ajk-gitlab-docs-deprecation-use-schema-types.yml

+---
+title: Change the way deprecation information is presented in GraphQL documentation
+merge_request: 56864
+author:
+type: changed

changelogs/unreleased/ajk-graphql-fancy-deprecations.yml

----
-title: Change how we handle deprecations in GraphQL docs
-merge_request: 56698
-author:
-type: changed