add action item if kubebuilder freshness check fails

Author: LiorLieberman

.github/workflows/supported_features.yml

@@ -15,12 +15,14 @@ jobs:
         run: |
           RED='\033[0;31m'
           GREEN='\033[0;32m'
+          YELLOW='‘\033[1;33m'
           NC='\033[0m'
           current_features=$(grep -B 1 'type SupportedFeature string' apis/v1/gatewayclass_types.go | grep -oP '// \+kubebuilder:validation:Enum=\K.*') 
           expected_features=$(go run hack/supportedfeatures/main.go)
           if [[ "$current_features" != "$expected_features" ]]; then
             echo "found diff between the current and the expected supportedFeatures"
             echo -e "expected: ${GREEN}${expected_features}${NC}"
             echo -e "current: ${RED}${current_features}${NC}"
+            echo -e "${YELLOW}Please run \`go run hack/supportedfeatures/main.go\` and update +kubebuilder:validation:Enum in gatewayclass_types.go${NC}"
             exit 1
           fi