fix: correct LDFLAGS path for default Kubernetes version

The Makefile LDFLAGS were pointing to an incorrect package path
(helm.sh/helm/v4/pkg/chart/common/util) that doesn't exist, causing
the k8sVersionMajor and k8sVersionMinor variables to silently fail
to be set. This left the hardcoded defaults (1.20) in place.

After this fix, `helm template` now correctly defaults to Kubernetes
v1.34.0 (matching the bundled client-go version) instead of v1.20.0,
ensuring charts render with current stable API versions.

Testing scenario:

```sh
cat > /tmp/test-chart/Chart.yaml << 'EOF'
apiVersion: v2
name: test-chart
version: 1.0.0
kubeVersion: ">= 1.28.0-0"
EOF

./bin/helm template test-release /tmp/test-chart

cat > /tmp/test-chart-fail/Chart.yaml << 'EOF'
apiVersion: v2
name: test-chart-fail
version: 1.0.0
kubeVersion: ">= 1.35.0-0"
EOF

./bin/helm template test-release /tmp/test-chart-fail

Exit code 1
Error: chart requires kubeVersion: >= 1.35.0-0 which is incompatible with Kubernetes v1.34.0
```

Fixes #31508
Closes #31501
Closes #31502

Signed-off-by: Benoit Tigeot <benoit.tigeot@lifen.fr>
(cherry picked from commit b6a8c65216)

Makefile

@@ -67,8 +67,8 @@ LDFLAGS += -X helm.sh/helm/v4/pkg/chart/v2/lint/rules.k8sVersionMajor=$(K8S_MODU
 LDFLAGS += -X helm.sh/helm/v4/pkg/chart/v2/lint/rules.k8sVersionMinor=$(K8S_MODULES_MINOR_VER)
 LDFLAGS += -X helm.sh/helm/v4/pkg/internal/v3/lint/rules.k8sVersionMajor=$(K8S_MODULES_MAJOR_VER)
 LDFLAGS += -X helm.sh/helm/v4/pkg/internal/v3/lint/rules.k8sVersionMinor=$(K8S_MODULES_MINOR_VER)
-LDFLAGS += -X helm.sh/helm/v4/pkg/chart/common/util.k8sVersionMajor=$(K8S_MODULES_MAJOR_VER)
-LDFLAGS += -X helm.sh/helm/v4/pkg/chart/common/util.k8sVersionMinor=$(K8S_MODULES_MINOR_VER)
+LDFLAGS += -X helm.sh/helm/v4/pkg/chart/common.k8sVersionMajor=$(K8S_MODULES_MAJOR_VER)
+LDFLAGS += -X helm.sh/helm/v4/pkg/chart/common.k8sVersionMinor=$(K8S_MODULES_MINOR_VER)
 LDFLAGS += -X helm.sh/helm/v4/internal/version.kubeClientVersionMajor=$(K8S_MODULES_MAJOR_VER)
 LDFLAGS += -X helm.sh/helm/v4/internal/version.kubeClientVersionMinor=$(K8S_MODULES_MINOR_VER)