Embedded app name optional needs to precede enum

Without this, not specifying embeeded app name errors because it does not adhere to the enum validation.

api/v1alpha1/gitrepository_types.go

@@ -16,8 +16,8 @@ type GitRepositorySpec struct {
 }
 
 type GitRepositorySource struct {
-	// +kubebuilder:validation:Enum:=argocd;backstage;crossplane;gitea;nginx
 	// +kubebuilder:validation:Optional
+	// +kubebuilder:validation:Enum:=argocd;backstage;crossplane;gitea;nginx
 	EmbeddedAppName string `json:"embeddedAppName"`
 	// Path is the absolute path to directory that contains Kustomize structure or raw manifests.
 	// This is required when Type is set to local.