Add Zig setup step to release workflow

.github/workflows/release.yml

@@ -15,6 +15,13 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       
+      - name: Setup Zig
+        run: |
+          if ! command -v zig &> /dev/null; then
+            brew install zig
+          fi
+          zig version
+      
       - name: Run tests
         run: |
           cd scripts/manwhere && zig build test