Update dependency MessagePack to 2.5.305

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
MessagePack	2.5.302 → 2.5.305

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Release Notes

MessagePack-CSharp/MessagePack-CSharp (MessagePack)

v2.5.305

Security fix

• Fixes Unescaped dot metacharacters in AssemblyNameVersionSelectorRegex cause catastrophic backtracking

Full Changelog: MessagePack-CSharp/MessagePack-CSharp@v2.5.303...v2.5.305

v2.5.303

Security Fix

• Fix Nested arrays can blow past buffer length limits via 7fd78bb

Full Changelog: MessagePack-CSharp/MessagePack-CSharp@v2.5.302...v2.5.303

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What changed in this PR

Updates the MessagePack NuGet dependency to a newer patch version that includes published security fixes.

Changes:

• Bumps MessagePack from 2.5.302 to 2.5.305 in centralized package management.

File	Description
Directory.Packages.props	Updates the centralized MessagePack package version to 2.5.305 to pick up security fixes.

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