Shallow clone emsdk (#437)

Author: mcbarton

.github/workflows/deploy-pages.yml

@@ -74,7 +74,7 @@ jobs:
     - name: Setup emsdk
       shell: bash -l {0}
       run: |
-          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 }}
 

.github/workflows/emscripten.yml

@@ -121,7 +121,7 @@ jobs:
     - name: Setup emsdk
       if: ${{ runner.os != 'windows' && steps.cache.outputs.cache-hit != 'true' }}
       run: |
-          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 }}
 
@@ -523,7 +523,7 @@ jobs:
     - name: Setup emsdk
       shell: bash -l {0}
       run: |
-          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 }}