chore: improve the diff format for upgrade-to-v1 command

[wangyelei]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 42.10%. Comparing base (02962c4) to head (2404ce8).
⚠️ Report is 33 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/cmd/cluster/upgrade_to_1.0.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #595   +/-   ##
=======================================
  Coverage   42.10%   42.10%           
=======================================
  Files         184      184           
  Lines       24516    24518    +2     
=======================================
+ Hits        10322    10324    +2     
  Misses      13042    13042           
  Partials     1152     1152           

Flag	Coverage Δ
unittests	42.10% <0.00%> (+<0.01%)	⬆️

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[wangyelei]

/cherry-pick release-1.0

[apecloud-bot]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kbcli/actions/runs/14103459263