Bump goto-bus-stop/setup-zig from 1 to 2 (#4)

Author: dependabot[bot]

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v3
       with:
         submodules: true
-    - uses: goto-bus-stop/setup-zig@v1
+    - uses: goto-bus-stop/setup-zig@v2
       with:
         version: master
     - name: Build