Bump mlugg/setup-zig from 1 to 2 (#6)

Author: dependabot[bot]

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
-    - uses: mlugg/setup-zig@v1
+    - uses: mlugg/setup-zig@v2
       with:
         version: 0.13.0
     - name: Build