docs: update CLA info (#15370)

* docs: udpate CLA info

* docs: update CONTRIBUTING.md

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* fix: lint

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

CONTRIBUTING.md

@@ -19,7 +19,7 @@ To report a security vulnerability in ESLint, please use our [HackerOne program]
 
 ## Contributing Code
 
-Please sign our [Contributor License Agreement](https://cla.js.foundation/eslint/eslint) and read over the [Pull Request Guidelines](https://eslint.org/docs/developer-guide/contributing/pull-requests).
+In order to submit code or documentation to an ESLint project, you’ll be asked to sign our CLA when you send your first pull request. (Read more about the Open JS Foundation CLA process at <https://cla.openjsf.org/>.) Also, please read over the [Pull Request Guidelines](https://eslint.org/docs/developer-guide/contributing/pull-requests).
 
 ## Full Documentation