chore(ci): use a proper token

.gitlab-ci.yml

@@ -43,7 +43,7 @@ prepare:
     - npx release-it --ci --no-npm --gitlab.release --dry-run
     - >-
       curl
-      --header "PRIVATE-TOKEN: $CI_JOB_TOKEN"
+      --header "PRIVATE-TOKEN: $RELEASE_IT_TOKEN"
       --request PUT "$CI_API_V4_URL/projects/$CI_PROJECT_ID/merge_requests/CI_MERGE_REQUEST_IID?target_branch=main"
   rules:
     - if: $CI_COMMIT_BRANCH =~ /^[0-9]+-next-release/