shallow clone emsdk main.yml

Author: mcbarton

.github/workflows/main.yml

@@ -239,7 +239,7 @@ jobs:
         shell: bash -l {0}
         run: |
           cd $HOME
-          git clone https://github.com/emscripten-core/emsdk.git
+          git clone --depth=1 https://github.com/emscripten-core/emsdk.git
           cd emsdk
           ./emsdk install  ${{ matrix.emsdk_ver }}