Merge pull request #499 from redis/autodetect_custom_ref_type_master

Remove custom_ref_type since it's autodetected

Author: Peter-Sh

.github/workflows/nightly-unstable-package.yml

@@ -15,6 +15,5 @@ jobs:
       redisjson_version: master
       redisbloom_version: master
       redistimeseries_version: master
-      custom_ref_type: branch
       run_type: nightly