chore: fix typo

[deerskindoll]

What does this pull request change?

fix typo in Configuring cluster roles for Che users

What issues does this pull request fix or reference?

eclipse-che/che#23085

Specify the version of the product this pull request applies to

main

Pull Request checklist

The author and the reviewers validate the content of this pull request with the following checklist, in addition to the automated tests.

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  • Successfully tested.
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[deerskindoll]

@tolusha I used your suggestion for the clusterbinding name: {USER_ROLES}-operator

is that ok?