Revert Rollback of Visual Studio version in Appveyor

[jbytheway]

Summary

SUMMARY: None

Purpose of change

In #42847 I rolled back the Appveyor VS version because the latest was causing issues.

Now the "previous" version is the one that was problematic.

Describe the solution

Revert the rollback and hope the new version has fixed the issue.

Even if it hasn't, we probably still want to revert this change. Whenever a fix does arrive we'll get it faster.

Describe alternatives you've considered

None

Testing

Needs to be tested here on CI.

[jbytheway]

Hmm... Seems to have gotten even worse

Fetching repository commit (61dbfaf)...OK
Total: 267.6 MB in 4512 files
Restoring build cache
Cache 'c:\tools\vcpkg\installed' - Restored
Running Install scripts
vcpkg --triplet x64-windows-static install sdl2 sdl2-image sdl2-mixer sdl2-ttf gettext
Computing installation plan...
The following packages are already installed:
    gettext[core]:x64-windows-static
    sdl2[core]:x64-windows-static
    sdl2-image[core]:x64-windows-static
    sdl2-ttf[core]:x64-windows-static
The following packages will be rebuilt:
    sdl2-mixer[core,nativemidi]:x64-windows-static
If you are sure you want to rebuild the above packages, run the command with the --recurse option
Command exited with code 1

Anyone know enough Appveyor/vcpkg to understand this? Should we use the --recurse option as it suggests?

[ZhilkinSerg]

We don't really need vcpkg install script now - packages are handled via VS project files.