fix syntax error in build.yml

Author: Techatrix

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
         os: [windows-latest, ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
       - name: Setup Zig
         uses: mlugg/setup-zig@v2