Prepare changelog for release

Author: ringods

CHANGELOG.md

@@ -1,12 +1,17 @@
 ## 2.11.0 (Unreleased)
+
+ENHANCEMENTS:
+* Improvements to resource `gitlab_user` import
+  (GH-340)
+
 ## 2.10.0 (June 09, 2020)
 
 FEATURES:
 * **New Resource:** `gitlab_service_github`
   ([#311](https://github.com/terraform-providers/terraform-provider-gitlab/issues/311))
 
 ENHANCEMENTS:
-* add attribute remove_source_branch_after_merge to projects
+* add attribute `remove_source_branch_after_merge` to projects
   ([#289](https://github.com/terraform-providers/terraform-provider-gitlab/issues/289))
 
 BUGFIXES: