Update eepp-build-check.yml

Another test.

.github/workflows/eepp-build-check.yml

@@ -10,14 +10,9 @@ jobs:
     - name: Checkout repository
       with:
         fetch-depth: 2
-        ref: develop
-    - uses: actions/checkout@v2
+        ref: develop  
     - name: Checkout submodules
-      shell: bash
-      run: |
-        auth_header="$(git config --local --get http.https://github.com/.extraheader)"
-        git submodule sync --recursive
-        git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
+      uses: textbook/git-checkout-submodule-action@2.0.0
     - name: Install dependencies
       run: |
         sudo apt-get update