Bump github.com/gardener/gardener from 1.90.2 to 1.90.4

Bumps [github.com/gardener/gardener](https://github.com/gardener/gardener) from 1.90.2 to 1.90.4.
- [Release notes](https://github.com/gardener/gardener/releases)
- [Commits](gardener/gardener@v1.90.2...v1.90.4)

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

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

go.mod

@@ -4,7 +4,7 @@ go 1.22.0
 
 require (
 	github.com/ahmetb/gen-crd-api-reference-docs v0.3.0
-	github.com/gardener/gardener v1.90.2
+	github.com/gardener/gardener v1.90.4
 	github.com/go-logr/logr v1.4.1
 	github.com/onsi/ginkgo/v2 v2.15.0
 	github.com/onsi/gomega v1.31.1

go.sum

@@ -98,8 +98,8 @@ 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/etcd-druid v0.22.0 h1:DVe+Zjrb93r9vI1uUiCTMHBffIUoMAKhNzFZNC6hsQ8=
 github.com/gardener/etcd-druid v0.22.0/go.mod h1:FROhfVKyWBo4krlPe3R6FIhJRmOmijEWBdEeUP0CJjE=
-github.com/gardener/gardener v1.90.2 h1:aQaejAynj7l2ZoB+h1op+TBZkjVdvMhE9i8MaCO8qUc=
-github.com/gardener/gardener v1.90.2/go.mod h1:2oopZmb8fQbXXeypRpiY2Nj0kVcobxsMYUn7HOupX84=
+github.com/gardener/gardener v1.90.4 h1:BpNE4J1kIjRhRw+xPDKyWvhYfqkJC6wTWll10hcisbQ=
+github.com/gardener/gardener v1.90.4/go.mod h1:2oopZmb8fQbXXeypRpiY2Nj0kVcobxsMYUn7HOupX84=
 github.com/gardener/hvpa-controller/api v0.5.0 h1:f4F3O7YUrenwh4S3TgPREPiB287JjjUiUL18OqPLyAA=
 github.com/gardener/hvpa-controller/api v0.5.0/go.mod h1:QQl3ELkCaki+8RhXl0FZMfvnm0WCGwGJlGmrxJj6lvM=
 github.com/gardener/machine-controller-manager v0.52.0 h1:irhpamQ/QXixCXJpNKRL71aM3FAdNO1HxZwA54jvncI=