chore(deps): update dependency polyfill to 9.7.2

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	patch	9.7.1 → 9.7.2

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Release Notes

SimonCropp/Polyfill (Polyfill)

v9.7.2

Compare Source

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[thomhurst]

Summary

Updates the Polyfill dependency from 9.7.1 to 9.7.2 for build-time type generation on older target frameworks.

Critical Issues

None found ✅

TUnit Rules Check

• ✅ No source generator output changes
• ✅ No public API changes
• ✅ No dual-mode concerns
• ✅ No reflection or AOT concerns
• ✅ No hot path performance impact
• ✅ No VSTest usage

This is a straightforward patch version bump of a build-time dependency. The Polyfill package is only used at compile-time for older target frameworks (netstandard2.0, netstandard2.1, .NET Framework) and has no runtime impact.

Verdict

✅ APPROVE - No critical issues