ci: update Xcode to 26.0

Author: m154k1

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
 
       - name: Select Xcode
         run: |
-          sudo xcode-select -s /Applications/Xcode_16.4.app
+          sudo xcode-select -s /Applications/Xcode_26.0.app
           xcodebuild -version
 
       - name: Create Stow Directory