Action Modifies is optional, so it should have omitempty tag.

Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>

pkg/bundle/bundle.go

@@ -116,7 +116,7 @@ type Action struct {
 	// Modifies indicates whether this action modifies the release.
 	//
 	// If it is possible that an action modify a release, this must be set to true.
-	Modifies bool `json:"modifies" mapstructure:"modifies"`
+	Modifies bool `json:"modifies,omitempty" mapstructure:"modifies"`
 	// Stateless indicates that the action is purely informational, that credentials are not required, and that the runtime should not keep track of its invocation
 	Stateless bool `json:"stateless,omitempty" mapstructure:"stateless"`
 	// Description describes the action as a user-readable string