Update to setup-zig@v2

Signed-off-by: AnErrupTion <anerruption@disroot.org>

Author: AnErrupTion

.github/workflows/test.yaml

@@ -8,7 +8,7 @@ jobs:
     name: Build and Test
     steps:
       - uses: actions/checkout@v3
-      - uses: mlugg/setup-zig@v1
+      - uses: mlugg/setup-zig@v2
         with:
           version: 0.15.0
       - run: zig build test