Fix typo in built-in role name: "Contributer" → "Contributor"

[changeworld]

Summary

This PR fixes a small typo in the documentation where the built-in role "Contributor" was incorrectly spelled as "Contributer".

Change Details

• Replaced "Contributer" with the correct spelling "Contributor" in a sentence discussing the use of built-in roles.

Reason

Accurate spelling of role names is essential for user clarity and aligns with official Azure RBAC terminology. This change helps avoid potential confusion for readers or users referencing this documentation.

Reference

• Azure built-in roles documentation

[prmerger-automator]

@changeworld : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit f990165:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/ai-services/language-service/question-answering/how-to/network-isolation.md	✅Succeeded
articles/ai-services/qnamaker/reference-private-endpoint.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[v-regandowner]

@jboback

Can you review the proposed changes?

Due to the upcoming BUILD conference, all merging and publishing is on hold until the morning of May 19th.

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[github-actions]

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