Update how-to-use-vm-token.md

[egor-yudkin]

Fixed the name of PowerShell cmdlet to call REST API from Invoke-RestMeth to Invoke-RestMethod

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[learn-build-service-prod]

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docs/identity/managed-identities-azure-resources/how-to-use-vm-token.md	✅Succeeded

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[Copilot]

Pull Request Overview

This PR fixes a typo in PowerShell cmdlet names throughout the Azure managed identity documentation, correcting Invoke-RestMeth to the proper Invoke-RestMethod.

• Corrects misspelled PowerShell cmdlet name in three code examples
• Ensures documentation accurately reflects the correct PowerShell API

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[v-dirichards]

@SHERMANOUKO

Can you review the proposed changes?

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"
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