revert cilium 1.16.4 --> 1.16.3

revert Merge pull request 'Update chart cilium to 1.16.4' (#887) from renovate/patch-cilium into main

Reviewed-on: #887

kubernetes/apps/kube-system/cilium/app/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: cilium
-      version: 1.16.4
+      version: 1.16.3
       sourceRef:
         kind: HelmRepository
         name: cilium

kubernetes/bootstrap/helmfile.yaml

@@ -23,7 +23,7 @@ releases:
   - name: cilium
     namespace: kube-system
     chart: cilium/cilium
-    version: 1.16.4
+    version: 1.16.3
     values:
       - ../apps/kube-system/cilium/app/helm-values.yml
     needs: