Commit 5bdb12e5 for libheif

commit 5bdb12e582d1f43c4cef839c98bdd776bfe0fb4f
Author: Dirk Farin <dirk.farin@gmail.com>
Date:   Sat Mar 21 22:23:41 2026 +0100

    appveyor: build vcpkgs only in Release mode

diff --git a/appveyor.yml b/appveyor.yml
index 114777af..4ff54ae3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -10,6 +10,13 @@ environment:
   - arch: arm64

 install:
+  # Build only Release vcpkg libraries (skip Debug) to halve install time
+  - ps: |
+      @('x64-windows', 'arm64-windows') | ForEach-Object {
+        $tripletDir = "C:\tools\vcpkg\triplets"
+        $content = (Get-Content "$tripletDir\$_.cmake" -Raw) + "`nset(VCPKG_BUILD_TYPE release)`n"
+        Set-Content "$tripletDir\$_.cmake" $content
+      }
   - vcpkg upgrade --no-dry-run
   - vcpkg install aom:%arch%-windows
   - vcpkg install dav1d:%arch%-windows