docs: use variabilized GitLab server FQDN in CI/CD component reference URLs

README.md

@@ -14,7 +14,7 @@ Add the following to your `.gitlab-ci.yml`:
 ```yaml
 include:
   # include the component
-  - component: gitlab.com/to-be-continuous/renovate/gitlab-ci-renovate@1.2.2
+  - component: $CI_SERVER_FQDN/to-be-continuous/renovate/gitlab-ci-renovate@1.2.2
 ```
 
 ### Use as a CI/CD template (legacy)