ci: run on macOS 26

Signed-off-by: Tommy van der Vorst <tommy@pixelspark.nl>

Author: pixelspark

.github/workflows/build.yml

@@ -14,7 +14,7 @@ permissions:
 
 jobs:
   build:
-    runs-on: macos-15
+    runs-on: macos-26
     steps:
       - name: Check Xcode version
         run: |