Add example of searching by tag

[sdwheeler]

PR Summary

Fixes AB#5078 - Add example of searching by tag

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.

[opbld33]

Docs Build status updates of commit 16d04ee:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/PowershellGet/Find-Module.md	✅Succeeded	View (powershell-5.1)
reference/7.0/PowerShellGet/Find-Module.md	✅Succeeded	View (powershell-7)
reference/7.2/PowerShellGet/Find-Module.md	✅Succeeded	View (powershell-7.2)
reference/7.3/PowerShellGet/Find-Module.md	✅Succeeded	View (powershell-7.3)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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