fix: updated external-dns deploymentStrategy (#2666)

Co-authored-by: svcAPLBot <[email protected]>
Co-authored-by: merll <[email protected]>

Author: 3 people

values/external-dns/external-dns.gotmpl

@@ -219,3 +219,6 @@ extraVolumeMounts:
 provider: {{ .name }}
 {{ .name }}: {{- . | get "external-dns" | toYaml | nindent 2 }}
 {{- end }}
+
+deploymentStrategy:
+  type: RollingUpdate