Add checksum into update-gemfile-lock

.gitlab-ci.yml

@@ -198,6 +198,7 @@ update-gemfile-lock:
     - git config user.name "${USER_NAME}"
     - git checkout "${TARGET_BRANCH}"
   script:
+    - ./jh/bin/merge_checksum
     - ./jh/bin/adjust_gemfile_lock
     - . scripts/utils.sh
     - bundle_install_script