AWS ClusterHostedDNS: Fix IP address for AWS DNS resolution

The IP address for the Nameserver to be used as resolver for everything
other than API, API-Int and *.apps was incorrect. Fixed it based
on AWS documentation.

Author: sadasu

templates/common/aws/units/aws-update-dns.service.yaml

@@ -13,7 +13,7 @@ contents: |
   [Service]
   Type=oneshot
   RemainAfterExit=yes
-  ExecStart=/usr/local/bin/update-dns-server 169.254.169.254
+  ExecStart=/usr/local/bin/update-dns-server 169.254.169.253
 
   [Install]
   RequiredBy=kubelet-dependencies.target