Dispose subprocess descendants after leader exit

internal/adapters/subprocess/process_tree_windows.go

@@ -105,7 +105,7 @@ func (tree *windowsProcessTree) TerminateForcefully() error {
 	return tree.terminate()
 }
 
-func (tree *windowsProcessTree) Close() error {
+func (tree *windowsProcessTree) Dispose() error {
 	if tree.job == 0 {
 		return nil
 	}