[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

frontend/README.md

@@ -30,4 +30,4 @@
     npm start
     ```
 
-6. Open your browser and navigate to [http://localhost:3000/](http://localhost:3000/)
+6. Open your browser and navigate to [http://localhost:3000/](http://localhost:3000/)