Fix HTML rendering content issue in code block

[xmdanni]

PR Summary

• Fixes AB#263684 - Fixes syntax error in example 16 for get-winevent doc, "<=" in filterxml #11176

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit 11fe15f:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Diagnostics/Get-WinEvent.md	✅Succeeded	View (powershell-5.1)
reference/7.2/Microsoft.PowerShell.Diagnostics/Get-WinEvent.md	✅Succeeded	View (powershell-7.2)
reference/7.4/Microsoft.PowerShell.Diagnostics/Get-WinEvent.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Diagnostics/Get-WinEvent.md	✅Succeeded	View (powershell-7.5)

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[sdwheeler]

Thanks @xmdanni. That change makes sense.