Install promu v0.7.0 (#8148)
Install promu v0.7.0 (#8148)

Will start producing ZIP archives for Windows releases in addition to tarballs.

Signed-off-by: Tobias Schmidt <25d72cd05b750b8e431a98389fb858a4199d229b@gmail.com>
GoogleCloudPlatform/prometheus,alileza/prometheus,prometheus/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,keegancsmith/prometheus,alileza/prometheus,prometheus/prometheus,keegancsmith/prometheus,prometheus/prometheus,prometheus/prometheus,alileza/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus