v0.6.0 breaks prometheus configmap mounts

[dannykopping]

MountVolume.SetUp failed for volume "configmap-reload-alerts" : configmap "coder-metrics-alerts" not found

[dannykopping]

@aslafy-z heads up, I've pushed a v0.6.1 tag with a fix

[aslafy-z]

Thank you @dannykopping ,I will try this tomorrow