Update build.yml

.github/workflows/build.yml

@@ -11,8 +11,11 @@ jobs:
           curl -sSfL https://github.com/leanprover/elan/releases/download/v1.4.2/elan-x86_64-unknown-linux-gnu.tar.gz | tar xz
           ./elan-init -y --default-toolchain none
           echo "$HOME/.elan/bin" >> $GITHUB_PATH
+      
       - uses: actions/checkout@v2
+      
       - name: get cache
         run: lake exe cache get
+      
       - name: build game
         run: env LEAN_ABORT_ON_PANIC=1 lake build