doc: improve docs for semantic release

README.md

@@ -55,6 +55,8 @@ You will also need a file called `.releaserc.json` included in your project. Cop
 }
 ```
+Next, create a [Project Access Token](https://docs.gitlab.com/ee/user/project/settings/project_access_tokens.html) with `api` and `write_repository` scope and make it available in your CI environment via the `GITLAB_TOKEN` environment variable through the CI/CD Variables settings.
+
 ```yaml
 include:
   - project: 'gitlab-com/gl-infra/common-ci-tasks'