Commit 25ef430e for libheif

commit 25ef430e71138b76eb69fa9a8477f9a701012a38
Author: Dirk Farin <dirk.farin@gmail.com>
Date:   Sun Mar 22 02:26:23 2026 +0100

    appveyor: upgrade all vcpkg dependencies, install ffmpeg

diff --git a/appveyor.yml b/appveyor.yml
index 68379504..d027332e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -18,11 +18,11 @@ install:
         Set-Content "$tripletDir\$_.cmake" $content
       }
   # --- Phase 1: remove ffmpeg, upgrade everything else ---
-  - vcpkg remove ffmpeg:%arch%-windows --recurse 2>NUL & ver>NUL
-  - vcpkg upgrade --no-dry-run
-  # --- Phase 2: uncomment the two lines below to compile ffmpeg ---
+  #- vcpkg remove ffmpeg:%arch%-windows --recurse 2>NUL & ver>NUL
   #- vcpkg upgrade --no-dry-run
-  #- vcpkg install ffmpeg[avcodec]:%arch%-windows
+  # --- Phase 2: uncomment the two lines below to compile ffmpeg ---
+  - vcpkg upgrade --no-dry-run
+  - vcpkg install ffmpeg[avcodec]:%arch%-windows
   - vcpkg install aom:%arch%-windows
   - vcpkg install dav1d:%arch%-windows
   - vcpkg install libde265:%arch%-windows