`codeQL.cli.executablePath` description does not render markdown formatting

[Marcono1234]

Describe the bug
The description for the config setting codeQL.cli.executablePath contains markdown formatting, but it is rendered as plaintext.
package.json should use the "markdownDescription" property instead of plaintext "description".

Version
Extension:

CodeQL extension version: 1.5.1 
CodeQL CLI version: 2.5.7 
Platform: win32 x64

VSCode:

Version: 1.57.1 (user setup)
Commit: 507ce72a4466fbb27b715c3722558bb15afa9f48
Date: 2021-06-17T13:28:07.755Z
Electron: 12.0.7
Chrome: 89.0.4389.128
Node.js: 14.16.0
V8: 8.9.255.25-electron.0
OS: Windows_NT x64 10.0.19041

To reproduce

1. Open the CodeQL extension settings (@ext:github.vscode-codeql)
2. Look at the "CodeQL > CLI: Executable Path" description
   ❌ It contains plaintext markdown: ... is named `codeql` on Linux/Mac ...