confirm react-jest.yaml is activate to run

fix typo

.github/workflows/react-jest.yaml

@@ -4,6 +4,7 @@ on:
     paths:
       - "src/**.tsx"
       - "src/**.ts"
+      - "public/**.html"
 
 defaults:
   run:

src/__tests__/App.test.tsx

@@ -2,6 +2,7 @@ import React from "react";
 import { render, screen } from "@testing-library/react";
 import App from "../App";
 
+// 画面にLearn Reactの文字が出るかテスト
 test("renders learn react link", () => {
   render(<App />);
   const linkElement = screen.getByText(/learn react/i);