Fix typo in UpdateLabel comment

Bob Singhrequested to merge
bobsingh.dev/client-go:fix-label-comment-typo into main

What does this MR do?

Fixes a typo in the UpdateLabel comment.

Why was this MR needed?

Improves documentation accuracy.

What's the best way to test this MR?

No testing required (comment change only).

What are the relevant issue numbers?

None.

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