Add 8.11.7, 8.10.10, and 8.9.10 CHANGELOG-EE entries

Signed-off-by: Rémy Coutable <remy@rymai.me>

CHANGELOG-EE

 Please view this file on the master branch, on stable branches it's out of date.
+
 v 8.12.0 (Unreleased)
   - Include more data in EE usage ping
   - Reduce UPDATE queries when moving between import states on projects
@@ -13,6 +14,10 @@ v 8.12.0 (Unreleased)
   - [ES] Improve logging
   - Fix projects with remote mirrors asynchronously destruction
 
+v 8.11.7
+  - Refactor Protected Branches dropdown. !687
+  - Fix mirrored projects allowing empty import urls. !700
+
 v 8.11.6
   - Exclude blocked users from potential MR approvers.
 
@@ -53,6 +58,9 @@ v 8.11.0
   - [ES] Limit amount of retries for sidekiq jobs
   - Fix Projects::UpdateMirrorService to allow tags pointing to blob objects
 
+v 8.10.10
+  - No EE-specific changes
+
 v 8.10.9
   - Exclude blocked users from potential MR approvers.
 
@@ -98,6 +106,12 @@ v 8.10.0
   - Ticket-based Kerberos authentication (SPNEGO)
   - [Elastic] Suppress ActiveRecord::RecordNotFound error in ElasticIndexWorker
 
+v 8.9.10
+  - No EE-specific changes
+
+v 8.9.9
+  - No EE-specific changes
+
 v 8.9.8
   - No EE-specific changes