The slack channel link doesn't work anymore

[clin4]

Describe the bug I try to subscribe to the crane/gocrane slack channel, but it doesn't work anymore

Reproduce steps

1. click the slack channel link in gocrane github page https://gocrane.slack.com

Expected behavior subscribe to the channel

Screenshots

Environment (please complete the following information):

• K8S Version: [e.g. 1.19]
• Crane Version: [e.g. 0.1.0]
• Browser [e.g. chrome, safari]