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fix sorting taints in case the sorting keys are equal
**What this PR does / why we need it**:
/kind bug
/sig cli
When describing node taints, the similar issue mentioned in #61250 also exists.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
xref #61250
**Special notes for your reviewer**:
/cc @kubernetes/sig-cli-bugs
@kubernetes/sig-cli-api-reviews
**Release note**:
```release-note
fix sorting taints in case the sorting keys are equal
```