docs: update missing developer doc link

(cherry picked from commit 2761d85)

Author: MeAkib

CONTRIBUTING.md

@@ -294,7 +294,7 @@ changes to be accepted, the CLA must be signed. It's a quick process, we promise
 [coc]: https://github.com/angular/code-of-conduct/blob/main/CODE_OF_CONDUCT.md
 [commit-message-format]: https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit#
 [corporate-cla]: https://code.google.com/legal/corporate-cla-v1.0.html
-[dev-doc]: https://github.com/angular/angular-cli/blob/main/packages/angular/cli/README.md#development-hints-for-working-on-angular-cli
+[dev-doc]: https://github.com/angular/angular-cli/blob/main/docs/DEVELOPER.md
 [GitHub]: https://github.com/angular/angular-cli
 [gitter]: https://gitter.im/angular/angular-cli
 [individual-cla]: https://code.google.com/legal/individual-cla-v1.0.html

scripts/templates/contributing.ejs

@@ -284,7 +284,7 @@ changes to be accepted, the CLA must be signed. It's a quick process, we promise
 [coc]: https://github.com/angular/code-of-conduct/blob/main/CODE_OF_CONDUCT.md
 [commit-message-format]: https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit#
 [corporate-cla]: https://code.google.com/legal/corporate-cla-v1.0.html
-[dev-doc]: https://github.com/angular/angular-cli/blob/main/packages/angular/cli/README.md#development-hints-for-working-on-angular-cli
+[dev-doc]: https://github.com/angular/angular-cli/blob/main/docs/DEVELOPER.md
 [GitHub]: https://github.com/angular/angular-cli
 [gitter]: https://gitter.im/angular/angular-cli
 [individual-cla]: https://code.google.com/legal/individual-cla-v1.0.html