gitlab: Update chart to 10.4.3.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: Id65af3ef468e6275bd17c01375e25e70cf08aed7
diff --git a/gitlab-system/gitlab.yaml b/gitlab-system/gitlab.yaml
index 1ee9907..f396720 100644
--- a/gitlab-system/gitlab.yaml
+++ b/gitlab-system/gitlab.yaml
@@ -5,7 +5,7 @@
   namespace: gitlab-system
 spec:
   chart:
-    version: "10.3.5"
+    version: "10.4.3"
     values:
       global:
         appConfig: