fix(gitops): set targetNamespace to com-ermnvldmr in gotk-sync and bootstrap template (#35)

### Summary of Changes

- Set `targetNamespace: com-ermnvldmr` in `gotk-sync.yaml` and
`user-data.template.yaml` so application workloads deploy into the
dedicated `com-ermnvldmr` namespace.

ci/cloud-init/user-data.template.yaml

@@ -203,7 +203,7 @@ EOF_DNS
         namespace: flux-system
       spec:
         interval: 5m
-        targetNamespace: flux-system
+        targetNamespace: com-ermnvldmr
         sourceRef:
           kind: GitRepository
           name: ermnvldmr-repo

ci/k8s/clusters/production/flux-system/gotk-sync.yaml

@@ -16,7 +16,7 @@ metadata:
   namespace: flux-system
 spec:
   interval: 5m
-  targetNamespace: flux-system
+  targetNamespace: com-ermnvldmr
   sourceRef:
     kind: GitRepository
     name: ermnvldmr-repo