Clarify VS2019 requirement for vcpkg. (CleverRaven#54170)

Co-authored-by: akrieger <[email protected]>

doc/COMPILING/COMPILING-VS-VCPKG.md

@@ -10,6 +10,7 @@ Steps from current guide were tested on Windows 10 (64 bit), Visual Studio 2019
 * NTFS partition with ~15 Gb free space (~10 Gb for Visual Studio, ~1 Gb for vcpkg installation, ~3 Gb for repository and ~1 Gb for build cache);
 * Git for Windows (installer can be downloaded from [Git homepage](https://git-scm.com/));
 * Visual Studio 2019 (or 2015 Visual Studio Update 3 and above);
+  * **Note**: If you are using Visual Studio 2022, you must install the Visual Studio 2019 compilers to work around a vcpkg bug. In the Visual Studio Installer, select the 'Individual components' tab and search for / select the component that looks like 'MSVC v142 - VS 2019 C++ x64/x86 Build Tools'. See https://github.com/microsoft/vcpkg/issues/22287.
 * Latest version of vcpkg (see instructions on [vcpkg homepage](https://github.com/Microsoft/vcpkg)).
 
 **Note:** Windows XP is unsupported!