test: comment parallel execution in mcp test

it is the probable cause of random test failure in Github CI

Author: xenOs76

internal/cmd/mcp_test.go

@@ -8,8 +8,8 @@ import (
 )
 
 func TestIsMCPCommand(t *testing.T) {
-	t.Parallel()
-
+	// t.Parallel()
+	//
 	tests := []struct {
 		name string
 		args []string