use mlugg's setup-zig instead of goto-bus-stop

Author: rdunnington

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{matrix.os}}
     steps:
       - uses: actions/checkout@v2
-      - uses: goto-bus-stop/setup-zig@v2
+      - uses: mlugg/setup-zig@v1
         with:
           version: 0.14.0
       - run: zig build test