gomod(deps): bump github.com/gardener/external-dns-management

Bumps [github.com/gardener/external-dns-management](https://github.com/gardener/external-dns-management) from 0.18.3 to 0.18.4.
- [Release notes](https://github.com/gardener/external-dns-management/releases)
- [Commits](gardener/external-dns-management@v0.18.3...v0.18.4)

---
updated-dependencies:
- dependency-name: github.com/gardener/external-dns-management
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/avast/retry-go/v4 v4.5.1
 	github.com/cucumber/godog v0.14.0
 	github.com/gardener/cert-management v0.12.0
-	github.com/gardener/external-dns-management v0.18.3
+	github.com/gardener/external-dns-management v0.18.4
 	github.com/go-jose/go-jose/v3 v3.0.3
 	github.com/go-logr/logr v1.4.1
 	github.com/google/uuid v1.6.0

go.sum

@@ -33,8 +33,8 @@ github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nos
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/gardener/cert-management v0.12.0 h1:pMT15xtMFKmaKlzgBohBYOwoE29HC/S3QJKmLLU8zG4=
 github.com/gardener/cert-management v0.12.0/go.mod h1:jSqNDV4H1SR/9lLS412Uhqp0+ibPe6rgRupoDDDOxeg=
-github.com/gardener/external-dns-management v0.18.3 h1:CC37WDJ+niEvUesD17QShuKJpcByYPSd0HGuDrcUkA4=
-github.com/gardener/external-dns-management v0.18.3/go.mod h1:aCJx+GCzCNb3rFE9l+jhwtQAbU72hLOMyDVKxe5N3TI=
+github.com/gardener/external-dns-management v0.18.4 h1:v8TA3XgkU2THdyJfqeJKr/60bPe5znce15X5lz3pjAU=
+github.com/gardener/external-dns-management v0.18.4/go.mod h1:7aFu4BUkFEM1Il8GbWhHczA2UiGwNI4vjcTaTMthwwE=
 github.com/go-jose/go-jose/v3 v3.0.3 h1:fFKWeig/irsp7XD2zBxvnmA/XaRWp5V3CBsZXJF7G7k=
 github.com/go-jose/go-jose/v3 v3.0.3/go.mod h1:5b+7YgP7ZICgJDBdfjZaIt+H/9L9T/YQrVfLAMboGkQ=
 github.com/go-logr/logr v1.3.0/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=