AppVeyor: disable x86 Windows builds (don't worry, x86 is still suppo…

…rted)

x86 is still supported, but it's failing on AppVeyor and we will stop using it soon, so let's just make builds green.
I also added VS 2019 builds just in case.

appveyor.yml

@@ -7,6 +7,7 @@ skip_tags: true
 skip_branch_with_pr: true
 
 image:
+- Visual Studio 2019
 - Visual Studio 2022
 
 configuration:
@@ -17,7 +18,6 @@ configuration:
 
 platform:
 - x64
-- x86
 
 branches:
   except:
@@ -28,10 +28,6 @@ cache:
 
 for:
 -
-  matrix:
-    only:
-      - image: Visual Studio 2022
-
   before_build:
     - git submodule update --init --recursive
     - nuget restore src\engine.sln