Fix version (append -rc.0) in VERSION file (#5896)
Fix version (append -rc.0) in VERSION file (#5896)

Signed-off-by: Julius Volz <d7748b1e6f41fd74500c5ccae0980eab88c2ef61@gmail.com>
alileza/prometheus,keegancsmith/prometheus,kangwoo/prometheus,alileza/prometheus,prometheus/prometheus,Gouthamve/prometheus,alileza/prometheus,kangwoo/prometheus,keegancsmith/prometheus,prometheus/prometheus,prometheus/prometheus,alileza/prometheus,kangwoo/prometheus,keegancsmith/prometheus,alileza/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,kangwoo/prometheus