build(deps): bump caddy in /kubernetes/system/caddy

Bumps caddy from 2.11.2 to 2.11.4.

---
updated-dependencies:
- dependency-name: caddy
  dependency-version: 2.11.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

kubernetes/system/caddy/values.yaml

@@ -10,7 +10,7 @@ image:
     repository: caddy
     pullPolicy: IfNotPresent
     tagSuffix: ""
-    tag: 2.11.2
+    tag: 2.11.4
 service:
     type: LoadBalancer
     externalTrafficPolicy: Local