chore(deps): update helm release external-dns to v1.15.2 (#106)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

flux/apps/external-dns/helm-release.yml

@@ -8,7 +8,7 @@ spec:
   chart:
     spec:
       chart: external-dns
-      version: 1.15.0
+      version: 1.15.2
       sourceRef:
         kind: HelmRepository
         name: external-dns-charts