fix: install zig for all ARM64 builds

Author: kevinmichaelchen

.github/workflows/CI.yml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Install Zig
         uses: mlugg/setup-zig@v1
-        if: ${{ contains(matrix.target, 'aarch64') && runner.os != 'macOS' }}
+        if: ${{ contains(matrix.target, 'aarch64') }}
 
       - name: Cache NPM dependencies
         uses: actions/cache@v4