fix: Can't access terminal on pods

Created by: tracer1023

What type of PR is this?

/kind bug

What this PR does / why we need it:

Fix the problem of websocket proxy configuration on the proxy server. If there is a problem, can't access terminal.

Which issue(s) this PR fixes:

Fixes #kubesphere/kubesphere/4444

Special notes for reviewers:

Does this PR introduced a user-facing change?

fix: Can't access terminal on pods

Additional documentation, usage docs, etc.: