external-dns: update registry.k8s.io/external-dns/external-dns Docker tag to v0.15.1

Author: renovate[bot]

external-dns/kustomization.yaml

@@ -13,4 +13,4 @@ generators:
 - secret-generator.yaml
 images:
 - name: registry.k8s.io/external-dns/external-dns
-  newTag: v0.15.0@sha256:338dd8c526e1337a12db0c8ee81a59ce5815ea51b73756affcd1e5dca530105c
+  newTag: v0.15.1@sha256:4f3ba4c2bd28030caad05bb7b47fbf47549a46d5e8443b74f0be463550b4fc2b