krb5 commit [krb5-1.22]: Update Windows installer config for VS 2026

[ghudson at mit.edu]

https://github.com/krb5/krb5/commit/35d4ab4e684b6ba97aa0e291351fd6d499edf9a4
commit 35d4ab4e684b6ba97aa0e291351fd6d499edf9a4
Author: Greg Hudson <ghudson at mit.edu>
Date:   Thu Jun 11 22:52:15 2026 -0400

    Update Windows installer config for VS 2026
    
    (cherry picked from commit cba0aeecfbcc1d2f753e9ef78e93f4495d1bd149)

 src/windows/installer/wix/config.wxi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/windows/installer/wix/config.wxi b/src/windows/installer/wix/config.wxi
index ffd68d9cd..49dcce0f2 100644
--- a/src/windows/installer/wix/config.wxi
+++ b/src/windows/installer/wix/config.wxi
@@ -55,6 +55,8 @@
         <?define VCVer="142"?>
     <?elseif $(env.VISUALSTUDIOVERSION) = "17.0"?>
         <?define VCVer="143"?>
+    <?elseif $(env.VISUALSTUDIOVERSION) = "18.0"?>
+        <?define VCVer="145"?>
     <?else?>
         <?error Unknown MFC version?>
     <?endif?>