Update ci.yml

Author: lcp5y3

.github/workflows/ci.yml

@@ -23,7 +23,9 @@ jobs:
           sudo apt-get install -y lld llvm llvm-dev clang
 
       - name: Set up Zig
-        uses: mlugg/setup-zig@v1
+        uses: mlugg/setup-zig@v2
+        with:
+          version: 0.15.1
 
       - name: Check Formatting
         run: zig fmt --ast-check --check .