gh actions: fix zig version in bindings generation

.github/workflows/gen_bindings.yml

@@ -100,8 +100,6 @@ jobs:
         with:
           repository: floooh/sokol-zig
       - uses: goto-bus-stop/setup-zig@v2
-        with:
-          version: 0.11.0
       - uses: actions/download-artifact@v3
         with:
           name: ignore-me-zig