Update Microsoft.WSL.DeviceHost to 1.2.61

[Blue (OneBlue)]

Summary of the Pull Request

This changes updates to the latest DeviceHost package, which includes the fix for the TCP RST issue that's been causing instability in our tests

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[Copilot]

Pull request overview

Updates the WSL NuGet package reference for Microsoft.WSL.DeviceHost to pick up a newer DeviceHost build (intended to address the TCP RST instability referenced in the PR description).

Changes:

• Bump Microsoft.WSL.DeviceHost from 1.2.60-0 to 1.2.61-0 in packages.config.
• (Unintended) Introduces a UTF-8 BOM at the start of packages.config.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.