chore(deps): update dependency polyfill to 10.5.0

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	minor	10.4.0 → 10.5.0

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Release Notes

SimonCropp/Polyfill (Polyfill)

v10.5.0

Compare Source

• #​545 Add Regex.Count span overloads and Capture.ValueSpan

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Configuration

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This PR has been generated by Mend Renovate.

[claude]

Code Review: Polyfill 10.4.0 → 10.5.0

This is a routine Renovate-generated minor dependency bump with a single-line change.

Change: Directory.Packages.props — Polyfill version incremented from 10.4.0 to 10.5.0.

What's new in 10.5.0

• Added Regex.Count span overloads and Capture.ValueSpan (#545)

Assessment

✅ Safe to merge. This is a minor version bump that adds new API surface only — no breaking changes. The new span overloads (Regex.Count span variant, Capture.ValueSpan) align well with TUnit's performance-first posture and AOT compatibility requirements.

No concerns:

• Single file touched (Directory.Packages.props), correct use of centralized package versioning.
• Auto-merge is already enabled and appropriate for this change.
• No snapshot tests or source-gen output should be affected by a polyfill version bump.

[codacy-production]

Up to standards ✅

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