docs: add missing 4.4.0 changelog entry for #9755

[Evangelink]

What

Adds the missing [4.4.0] changelog entry for #9755 (Drop MSTest's VSTest bridge dependency on the MTP path, merged 2026-07-08).

MSTest.TestAdapter dropped its dependency on Microsoft.Testing.Extensions.VSTestBridge and now references Microsoft.Testing.Extensions.TrxReport.Abstractions, Microsoft.Testing.Extensions.Telemetry, and Microsoft.TestPlatform.ObjectModel directly. This is a user-visible dependency-graph change and belongs in the changelog.

Why

The change was repeatedly flagged as missing from docs/Changelog.md by the adhoc-qa reports (#9612, #9842, #9872, #9876). The other items those reports carry over are either already resolved (the #9600 entries are now present) or low-urgency/alpha (AOTSG0001–0005) / tracked elsewhere (#8940 TODOs).

Change

• Add a ### Changed entry under [4.4.0] in docs/Changelog.md.

[Copilot]

Pull request overview

Documents the native-only MTP dependency graph introduced by #9755 in the MSTest 4.4.0 changelog.

Changes:

• Adds a Changed section for 4.4.0.
• Records the removal and replacement of the VSTestBridge dependency.

Show a summary per file

File	Description
docs/Changelog.md	Adds the missing #9755 changelog entry.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Medium

[github-actions]

Note

🤖 Automated review by GitHub Copilot. Generated by the Expert Code Review workflow. To request a follow-up action, reply by tagging @copilot directly.

Review Summary

Documentation-only PR adding a changelog entry for PR #9755. No code changes.

#	Dimension	Verdict
1	Algorithmic Correctness	N/A
2	Threading & Concurrency	N/A
3	Security & IPC Contract Safety	N/A
4	Public API & Binary Compatibility	N/A
5	Performance & Allocations	N/A
6	Cross-TFM Compatibility	N/A
7	Error Handling & Diagnostics	N/A
8	Test Quality	N/A
9	Naming & Style Conventions	N/A
10	Code Documentation	N/A
11	Resource Management	N/A
12	Dependency Management	N/A
13	Localization	N/A
14	Changelog & Release Notes	✅ Pass
15	Scope Discipline	✅ Pass
16	Dead Code	N/A
17	Configuration & Feature Flags	N/A
18	Accessibility & UX	N/A
19	Logging Discipline	N/A
20	Serialization	N/A
21	Telemetry	N/A
22	PowerShell/Script Hygiene	N/A

Dimension 14 — Changelog & Release Notes

• Entry placed under ### Changed in the v4.4.0 (UNRELEASED) section — correct per Keep a Changelog (Changed before Fixed). ✅
• Author attribution (@Evangelink) and PR link (#9755) present and correctly formatted. ✅
• Description accurately reflects the dependency restructuring done in #9755. ✅

Dimension 15 — Scope Discipline

• Single-file change, single concern. ✅

No issues found. LGTM.