The 2019 version is no longer available

[John-Smiths]

PR Prelude

Thank you for working on YCM! :)

Please complete these steps and check these boxes (by putting an x inside the brackets) before filing your PR:

• [x] I have read and understood YCM's CONTRIBUTING document.
• [x] I have read and understood YCM's CODE_OF_CONDUCT document.
• [x] I have included tests for the changes in my PR. If not, I have included a rationale for why I haven't.
• [ ] I understand my PR may be closed if it becomes obvious I didn't actually perform all of these steps.

Why this change is necessary and useful

[Please explain in detail why the changes in this PR are needed.]

---

This change is 

[John-Smiths]

_可审查_状态：已获得 2 个 LGTM 中的 0 个（正在等待@John-Smiths）

README.mdr1 处第 635 行（原始文件）：

You can specify the Microsoft Visual C++ (MSVC) version using the `--msvc`
option. YCM officially supports MSVC 15 (2017), MSVC 16 (Visual Studio 2022) 

MSVC 16 不是 Visual Studio 2022。

你是说 MSVC 16 不再受支持（由 MS 还是 ycmd 支持？）

时间很长我已经忘了, 我记得当时按照文档安装2019版本无法进行安装,只有2022有MSVC的高版本