chore(deps): update dependency polyfill to 10.6.0

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	minor	10.5.1 → 10.6.0

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Release Notes

SimonCropp/Polyfill (Polyfill)

v10.6.0

Compare Source

• #​547 Add .NET 11 Process APIs
• #​548 Add dictionary/hash set get alternate lookup polyfill (o(n))
• #​549 Add string builder move chunks

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[claude]

Dependency Update Review: Polyfill 10.5.1 → 10.6.0

Change: Single-line version bump in Directory.Packages.props.

Release notes summary (v10.6.0):

• Add .NET 11 Process APIs polyfill
• Add dictionary/hash set GetAlternateLookup polyfill (O(n) — worth noting this is not O(1), unlike the native .NET 9+ version)
• Add StringBuilder move chunks

Assessment: Clean, low-risk minor version bump. The Polyfill package is a source generator that adds missing APIs for older target frameworks — it has no runtime footprint on target frameworks where the APIs already exist natively. All additions are purely additive; nothing was removed in this release.

The O(n) note on the alternate lookup polyfill is worth being aware of — if TUnit code ever starts using GetAlternateLookup on older TFMs expecting O(1) performance, it won't be. But this is not a concern introduced by this PR, just a general caveat about polyfill semantics.

Looks good to merge. ✅

[codacy-production]

Up to standards ✅

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[claude]

Follow-up Review

The prior claude[bot] review (approved, 2026-05-18) covers this change accurately — nothing new to add.

Summary: Single-line version bump of the source-generator package from 10.5.1 → 10.6.0. Purely additive new APIs (Process polyfills for .NET 11, GetAlternateLookup on Dictionary/HashSet, StringBuilder move chunks). Zero runtime footprint on TFMs that already have these APIs natively.

The prior review's O(n) caveat on the alternate-lookup polyfill remains the only thing worth noting, and it is not actionable here. Low-risk, good to merge.