ci: bump xcode

Bump to Xcode 16.3 to adjust for actions/runner-images#12541

Author: kazo0

build/workflow/pipeline.yml

@@ -45,7 +45,7 @@ variables:
   UseSkiaRendering: 'true'
   IsCanaryBranch: $[startsWith(variables['Build.SourceBranch'], 'refs/heads/canaries/')]
   IsReleaseBranch: $[or(eq(variables['Build.SourceBranch'], 'refs/heads/main'), startsWith(variables['Build.SourceBranch'], 'refs/heads/feature/'), startsWith(variables['Build.SourceBranch'], 'refs/heads/release/'))]
-  XCODE_ROOT: '/Applications/Xcode_16.2.app'
+  XCODE_ROOT: '/Applications/Xcode_16.3.app'
 
 jobs:
 - template: build-windows.yml
@@ -55,4 +55,4 @@ jobs:
 - template: build-skia-desktop.yml
 - template: stage-uitests-ios.yml
 - template: stage-uitests-android.yml
-- template: stage-uitests-wasm.yml
+- template: stage-uitests-wasm.yml