Added action to add submodule

.github/workflows/release.yml

@@ -19,6 +19,8 @@ jobs:
         uses: actions/checkout@v4
       - name: Set env
         run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Checkout submodules
+        uses: textbook/git-checkout-submodule-action@master
       - name: Build
         run: make
       - name: Log in to the Container registry