Crictl config cannot set debug to false

[liujing66]

Issue Description:
When I tested the sub option of crictl config, I found that "crictl config" cannot set debug to false。

crictl config --get debug

true

crictl config debug false

FATA[0000] use true|false for debug

It seems like a bug,the code 118-129 lines ，the if statement is missing the setting for value=“false”
case "debug":
var debug bool
if value == "true" {
debug = true
} else {
logrus.Fatal("use true|false for debug")
}
config.Debug = debug

My crio verison is:

crictl version

Version: 0.1.0
RuntimeName: cri-o
RuntimeVersion: 1.12.0-dev
RuntimeApiVersion: v1alpha1

[Random-Liu]

Feel free to send a fix for the bug. :)