Fix drone

Author: lunny

.drone.yml

@@ -240,7 +240,7 @@ steps:
       TAGS: bindata sqlite sqlite_unlock_notify
       RACE_ENABLED: true
       GITEA_UNIT_TESTS_DB_TYPE: mysql
-      GITEA_UNIT_TESTS_DB_CONNSTR: root:@tcp(mysql)/gitea_test?charset-utf8mb4
+      GITEA_UNIT_TESTS_DB_CONNSTR: root:@tcp(mysql:3306)/gitea_test?charset=utf8mb4
       GITHUB_READ_TOKEN:
         from_secret: github_read_token