Update README.md

Closes vercel#40336

Author: balazsorban44

packages/next/README.md

@@ -46,7 +46,7 @@ Please see our [contributing.md](/contributing.md).
 
 ### Good First Issues
 
-We have a list of [good first issues](https://github.com/vercel/next.js/labels/good%20first%20issue) that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
+We have a list of [good first issues](https://github.com/vercel/next.js/labels/good%20first%20issue) that contain bugs that have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
 
 ## Authors