Update CHANGELOG.md for 12.5.3

[ci skip]

CHANGELOG.md

@@ -2,6 +2,20 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 12.5.3
+
+### Fixed (4 changes)
+
+- Fix project creation with templates using /projects/user/:id API. !20590
+- Fix merging merge requests from push options. !20639
+- Fix Crossplane help link in cluster applications page. !20668
+- Fixes job log not scrolling to the bottom.
+
+### Changed (1 change)
+
+- Flatten exception details in API and controller logs. !20434
+
+
 ## 12.5.2
 ### Security (1 change)

changelogs/unreleased/20668-crossplane-help-link.yml

----
-title: Fix Crossplane help link in cluster applications page
-merge_request: 20668
-author:
-type: fixed

changelogs/unreleased/37313-scroll-to-bottom.yml

----
-title: Fixes job log not scrolling to the bottom
-merge_request:
-author:
-type: fixed

changelogs/unreleased/bvl-fix-merging-through-push-options.yml

----
-title: Fix merging merge requests from push options
-merge_request: 20639
-author:
-type: fixed

changelogs/unreleased/sh-fix-api-project-template-creation.yml

----
-title: Fix project creation with templates using /projects/user/:id API
-merge_request: 20590
-author:
-type: fixed

changelogs/unreleased/sh-flatten-json-exceptions.yml

----
-title: Flatten exception details in API and controller logs
-merge_request: 20434
-author:
-type: changed