bug: when a dependeny in cached in local, the sum in kcl.mod.lock will be lost.

[zong-zhe]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. Init a new kcl package and add a dependency

kcl mod init test_pkg
cd test_pkg
kcl mod add helloworld

2. cat kcl.mod.lock to show the content kcl.mod.lock

$ cat kcl.mod.lock
[dependencies]
  [dependencies.helloworld]
    name = "helloworld"
    full_name = "helloworld_0.1.3"
    version = "0.1.3"
    sum = "T9FGqbdtkuML4+pDyf4SFP5bDcDusbra6AKtCZygvNw="

3. Delete the kcl.mod.lock and kcl mod update

rm kcl.mod.lock
kcl mod update

4. cat kcl.mod.lock to show the new kcl.mod.lock

$ cat kcl.mod.lock
[dependencies]
  [dependencies.helloworld]
    name = "helloworld"
    full_name = "helloworld_0.1.3"
    version = "0.1.3"

The sum is missing.

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

kcl.mod.lock will be not changed after the steps in section 1.

3. What did you see instead (Required)

The sum is missing in kcl.mod.lock

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

The main branch