docs: update links to ci-configuration repo (#2261)

docs/ci-cd/README.md

@@ -50,7 +50,7 @@ As mentioned in the previous paragraph, the pre-configured hooks rely on the `in
 
 ### Configuration
 
-The firefox-ci configuration is stored in https://hg.mozilla.org/ci/ci-configuration/
+The firefox-ci configuration is stored in https://github.com/mozilla-releng/fxci-config/
 
 To make changes, lookup the relevant code-review sections in the `grants.yml`, `hooks.yml` and `projects.yml` files. You'll need to submit your patch on Phabricator, linked to a Bugzilla bug filed under **Release Engineering :: Firefox-CI Administration** (example on [Bug 1604227](https://bugzilla.mozilla.org/show_bug.cgi?id=1604227))
 

docs/projects/bot.md

@@ -8,7 +8,7 @@ The technical information on how to get started is available in the [project REA
 
 The project is built as a Docker in Docker image, on the firefox-ci instance (more information in [CI/CD](/docs/ci-cd/README.md)).
 
-Two hooks are available and configured through [ci-configuration](https://hg.mozilla.org/ci/ci-configuration/file/tip/hooks.yml):
+Two hooks are available and configured through [ci-configuration](https://github.com/mozilla-releng/fxci-config/blob/main/hooks.yml):
 
 - [project-relman/code-review-production](https://firefox-ci-tc.services.mozilla.com/hooks/project-relman/code-review-production)
 - [project-relman/code-review-testing](https://firefox-ci-tc.services.mozilla.com/hooks/project-relman/code-review-testing)