Fix MacOS CI. (#1187)

Use brew instead of SDK downloads

.github/workflows/build.yml

@@ -55,12 +55,7 @@ jobs:
           submodules: "recursive"  
       - name: Setup
         run: |
-          curl -L "https://sdk.lunarg.com/sdk/download/latest/mac/vulkan-sdk.zip" -o /tmp/vulkan-sdk.zip
-          unzip /tmp/vulkan-sdk.zip -d /tmp
-          /tmp/InstallVulkan.app/Contents/MacOS/InstallVulkan \
-              --root ~/VulkanSDK/latest --accept-licenses --default-answer --confirm-command install          
-          cd ~/VulkanSDK/latest
-          sudo ./install_vulkan.py
+          brew install vulkan-tools
           brew install libomp
       - name: Build
         run: |