ci: Clarify that previous_releases task is using DEBUG

Author: MarcoFalke

.cirrus.yml

@@ -112,7 +112,7 @@ task:
     FILE_ENV: "./ci/test/00_setup_env_i686_centos.sh"
 
 task:
-  name: '[previous releases, uses qt5 dev package and some depends packages] [unsigned char] [bionic]'
+  name: '[previous releases, uses qt5 dev package and some depends packages, DEBUG] [unsigned char] [bionic]'
   previous_releases_cache:
     folder: "releases"
   << : *GLOBAL_TASK_TEMPLATE