ci: install VCPKG on macOS before building

Author: KhoraLee

.github/workflows/build.yml

@@ -28,21 +28,23 @@ jobs:
           - build: macos
             os: macos-latest
             triplet: osx-release
-            vcpkg-root: /usr/local/share/vcpkg
+            vcpkg-root: /Users/runner/vcpkg
             extra-args: ""
           - build: macos
             os: macos-latest
             arch: universal
             triplet: osx-release
-            vcpkg-root: /usr/local/share/vcpkg
+            vcpkg-root: /Users/runner/vcpkg
             extra-args: --overlay-triplets=./triplets
 
     steps:
       - uses: actions/checkout@v4
 
       - name: Set up build environment (macos-latest)
         run: |
-          brew install nasm
+          brew install nasm vcpkg
+          git clone https://github.com/microsoft/vcpkg "$HOME/vcpkg"
+          echo VCPKG_ROOT="$HOME/vcpkg" >> $GITHUB_ENV
         if: matrix.os == 'macos-latest'
 
       - name: Set up build environment (ubuntu-latest)