Bump github.com/gardener/gardener from 1.80.4 to 1.81.2

Bumps [github.com/gardener/gardener](https://github.com/gardener/gardener) from 1.80.4 to 1.81.2.
- [Release notes](https://github.com/gardener/gardener/releases)
- [Commits](gardener/gardener@v1.80.4...v1.81.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -4,13 +4,13 @@ go 1.21.0
 
 require (
 	github.com/ahmetb/gen-crd-api-reference-docs v0.3.0
-	github.com/gardener/gardener v1.80.4
+	github.com/gardener/gardener v1.81.2
 	github.com/go-logr/logr v1.2.4
 	github.com/onsi/ginkgo/v2 v2.11.0
 	github.com/onsi/gomega v1.27.10
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
-	golang.org/x/tools v0.12.0
+	golang.org/x/tools v0.13.0
 	k8s.io/api v0.28.2
 	k8s.io/apimachinery v0.28.2
 	k8s.io/code-generator v0.28.2
@@ -23,7 +23,9 @@ require (
 	github.com/BurntSushi/toml v1.0.0 // indirect
 	github.com/Masterminds/goutils v1.1.1 // indirect
 	github.com/Masterminds/semver v1.5.0 // indirect
+	github.com/Masterminds/semver/v3 v3.2.1 // indirect
 	github.com/Masterminds/sprig v2.22.0+incompatible // indirect
+	github.com/Masterminds/sprig/v3 v3.2.2 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/blang/semver/v4 v4.0.0 // indirect
 	github.com/bronze1man/yaml2json v0.0.0-20211227013850-8972abeaea25 // indirect
@@ -87,26 +89,28 @@ require (
 	github.com/prometheus/common v0.44.0 // indirect
 	github.com/prometheus/procfs v0.10.1 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/spf13/afero v1.8.2 // indirect
+	github.com/shopspring/decimal v1.2.0 // indirect
+	github.com/spf13/afero v1.9.5 // indirect
+	github.com/spf13/cast v1.5.1 // indirect
 	github.com/ulikunitz/xz v0.5.10 // indirect
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
 	go.uber.org/mock v0.2.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	go.uber.org/zap v1.25.0 // indirect
-	golang.org/x/crypto v0.12.0 // indirect
-	golang.org/x/exp v0.0.0-20230213192124-5e25df0256eb // indirect
+	go.uber.org/zap v1.26.0 // indirect
+	golang.org/x/crypto v0.13.0 // indirect
+	golang.org/x/exp v0.0.0-20230321023759-10a507213a29 // indirect
 	golang.org/x/mod v0.12.0 // indirect
-	golang.org/x/net v0.14.0 // indirect
+	golang.org/x/net v0.15.0 // indirect
 	golang.org/x/oauth2 v0.8.0 // indirect
-	golang.org/x/sys v0.11.0 // indirect
-	golang.org/x/term v0.11.0 // indirect
-	golang.org/x/text v0.12.0 // indirect
+	golang.org/x/sys v0.12.0 // indirect
+	golang.org/x/term v0.12.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.4.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20230526161137-0005af68ea54 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20230525234035-dd9d682886f9 // indirect
-	google.golang.org/protobuf v1.30.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect