Update CHANGELOG.md for 12.2.3

[ci skip]

CHANGELOG.md

@@ -2,6 +2,34 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 12.2.3
+
+### Security (22 changes)
+
+- Ensure only authorised users can create notes on Merge Requests and Issues.
+- Gitaly: ignore git redirects.
+- Add :login_recaptcha_protection_enabled setting to prevent bots from brute-force attacks.
+- Speed up regexp in namespace format by failing fast after reaching maximum namespace depth.
+- Limit the size of issuable description and comments.
+- Send TODOs for comments on commits correctly.
+- Restrict MergeRequests#test_reports to authenticated users with read-access on Builds.
+- Added image proxy to mitigate potential stealing of IP addresses.
+- Filter out old system notes for epics in notes api endpoint response.
+- Avoid exposing unaccessible repo data upon GFM post processing.
+- Fix HTML injection for label description.
+- Make sure HTML text is always escaped when replacing label/milestone references.
+- Prevent DNS rebind on JIRA service integration.
+- Use admin_group authorization in Groups::RunnersController.
+- Prevent disclosure of merge request ID via email.
+- Show cross-referenced MR-id in issues' activities only to authorized users.
+- Enforce max chars and max render time in markdown math.
+- Check permissions before responding in MergeController#pipeline_status.
+- Remove EXIF from users/personal snippet uploads.
+- Fix project import restricted visibility bypass via API.
+- Fix weak session management by clearing password reset tokens after login (username/email) are updated.
+- Fix SSRF via DNS rebinding in Kubernetes Integration.
+
+
 ## 12.2.2
 
 ### Security (22 changes)