docs: Update yarn doc link in CONTRIBUTING.md
@@ -14,8 +14,8 @@ This page provides information about contributing code to the Jenkins core codeb
* Apache Maven 3.8.1 or above. You can [download Maven here](https://maven.apache.org/download.cgi).
In the Jenkins project we usually use the most recent Maven release.
* Any IDE which supports importing Maven projects.
- * Install [NodeJS](https://nodejs.org/en/). **Note:** only needed to work on the frontend assets found in the `war` module.
- * Frontend tasks are run using [yarn](https://yarnpkg.com/lang/en/). Run `npm install -g yarn` to install it.
+ * Install [NodeJS 16.x](https://nodejs.org/en/). **Note:** only needed to work on the frontend assets found in the `war` module.
+ * Frontend tasks are run using [yarn](https://yarnpkg.com/). Run `npm install -g yarn` to install it.
4. Set up your development environment as described in [Preparing for Plugin Development](https://www.jenkins.io/doc/developer/tutorial/prepare/)
If you want to contribute to Jenkins, or just learn about the project,
