.gitlab-ci.yml: Fix the issue that release job does not trigger.

Signed-off-by: lbuque <lbuque@163.com>

Author: lbuque

.gitlab-ci.yml

@@ -67,7 +67,11 @@ release_job:
   script:
     - echo "Releasing the M5Burn..."
     - python ./tools/release.py
+  only:
+    refs:
+      - tags
+    variables:
+      - $CI_COMMIT_TAG =~ /^release\/[0-9]+\.[0-9]+\.[0-9]+$/
+      - $CI_COMMIT_REF_SLUG == "develop_m5things"
   tags:
     - uiflow-firmware
-  rules:
-    - if: '$CI_COMMIT_TAG =~ /^release\/[0-9]+\.[0-9]+\.[0-9]+$/ && $CI_COMMIT_REF_SLUG == "develop_m5things"'