fix: oauth2-proxy dns config go template (#1655)

Author: Ani1357

values/oauth2-proxy/oauth2-proxy-raw.gotmpl

@@ -10,7 +10,7 @@ resources:
     metadata:
       annotations:
         externaldns: "true"
-        {{- if and $v.dns.provider (and $v.dns.provider.linode) }}
+        {{- with $v | get "dns.provider.linode" nil }}
         # Check Linode Api documentation for allowed values in seconds: https://developers-linode.netlify.app/api/v4/domains
         external-dns.alpha.kubernetes.io/ttl: "1h"
         {{- end }}