doc: update core-validate-commit url

PR-URL: #24331
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

Author: watilde

doc/guides/contributing/pull-requests.md

@@ -195,7 +195,7 @@ One of the existing contributors will help get things situated and the
 contributor landing the Pull Request will ensure that everything follows
 the project guidelines.
 
-See [core-validate-commit](https://github.com/evanlucas/core-validate-commit) -
+See [core-validate-commit](https://github.com/nodejs/core-validate-commit) -
 A utility that ensures commits follow the commit formatting guidelines.
 
 ### Step 5: Rebase

doc/onboarding.md

@@ -245,7 +245,7 @@ needs to be pointed out separately during the onboarding.
   the [summit](https://github.com/nodejs/summit) repository for details.
 
 [Code of Conduct]: https://github.com/nodejs/admin/blob/master/CODE_OF_CONDUCT.md
-[`core-validate-commit`]: https://github.com/evanlucas/core-validate-commit
+[`core-validate-commit`]: https://github.com/nodejs/core-validate-commit
 [`git-node`]: https://github.com/nodejs/node-core-utils/blob/master/docs/git-node.md
 [`node-core-utils`]: https://github.com/nodejs/node-core-utils
 [Landing Pull Requests]: https://github.com/nodejs/node/blob/master/COLLABORATOR_GUIDE.md#landing-pull-requests