🐛 Fix changes to Kubernetes version when running make generate

This commit changes how the Makefile handles updating Kubernetes version in cmd/version.go when running make generate.

Rely on ldflags to set kubernetesVendorVersion, similarly to the other variables in cmd/version.go.

Use a single variable to define K8S_VERSION for both ldflags and the goreleaser configuration.

This makes our version handling more consistent and avoids unnecessary diffs in version control when only generating docs or other build artifacts.

Author: vitorfloriano

Makefile

@@ -45,8 +45,11 @@ help: ## Display this help
 
 ##@ Build
 
+K8S_VERSION ?= $(shell go list -m -modfile=./testdata/project-v4/go.mod -f "{{ .Version }}" k8s.io/api | awk -F'[v.]' '{printf "1.%d.%d", $$3, $$4}')
+
 LD_FLAGS=-ldflags " \
     -X sigs.k8s.io/kubebuilder/v4/cmd.kubeBuilderVersion=$(shell git describe --tags --dirty --broken) \
+    -X sigs.k8s.io/kubebuilder/v4/cmd.kubernetesVendorVersion=$(K8S_VERSION) \
     -X sigs.k8s.io/kubebuilder/v4/cmd.goos=$(shell go env GOOS) \
     -X sigs.k8s.io/kubebuilder/v4/cmd.goarch=$(shell go env GOARCH) \
     -X sigs.k8s.io/kubebuilder/v4/cmd.gitCommit=$(shell git rev-parse HEAD) \
@@ -201,13 +204,10 @@ install-helm: ## Install the latest version of Helm locally
 helm-lint: install-helm ## Lint the Helm chart in testdata
 	helm lint testdata/project-v4-with-plugins/dist/chart
 
-K8S_VERSION ?= $(shell go list -m -modfile=./testdata/project-v4/go.mod -f "{{ .Version }}" k8s.io/api | awk -F'[v.]' '{printf "1.%d.%d", $$3, $$4}')
 .PHONY: update-k8s-version
-update-k8s-version: ## Update Kubernetes API version in version.go and .goreleaser.yml
+update-k8s-version: ## Update Kubernetes API version in .goreleaser.yml
 	@if [ -z "$(K8S_VERSION)" ]; then echo "Error: K8S_VERSION is empty"; exit 1; fi
-	@echo "Updating Kubernetes version to $(K8S_VERSION)"
-	@# Update version.go
-	@sed -i.bak 's/kubernetesVendorVersion = .*/kubernetesVendorVersion = "$(K8S_VERSION)"/' cmd/version.go
+	@echo "Updating Kubernetes version to $(K8S_VERSION) in .goreleaser.yml"
 	@# Update .goreleaser.yml
 	@sed -i.bak 's/KUBERNETES_VERSION=.*/KUBERNETES_VERSION=$(K8S_VERSION)/' build/.goreleaser.yml
 	@# Clean up backup files