bug: kcl mod add k8s panic

[zong-zhe]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

2. What did you expect to see? (Required)

kcl mod add k8s should add the dependency k8s:1.29 successfully.

3. What did you see instead (Required)

It panic.

4. What is your KCL components version? (Required)

The main branch of KCL CLI installed by go install kcl-lang.io/cli/cmd/kcl@main.

[Peefy]

Closed by kcl-lang/kpm#239