Update build.yml

Author: swhitty

.github/workflows/build.yml

@@ -9,7 +9,7 @@ jobs:
   xcode_16_4:
     runs-on: macos-15
     env:
-      DEVELOPER_DIR: /Applications/Xcode_16.4.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_16.3.app/Contents/Developer
     steps:
       - name: Checkout
         uses: actions/checkout@v4