ci: Checkout submodule correctly

Signed-off-by: Joas Schilling <[email protected]>

Author: nickvergessen

.github/workflows/integration.yml

@@ -60,16 +60,13 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
+          submodules: recursive
           repository: nextcloud/server
           ref: ${{ matrix.server-versions }}
 
-      - 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
-          cd build/integration && composer require --dev phpunit/phpunit:~9
+      - name: Set up integration dependencies
+        working-directory: build/integration
+        run: composer require --dev phpunit/phpunit:~9
 
       - name: Checkout app
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2