Fix for submodules

Author: PhilWindle

.github/workflows/deploy-staging-network.yml

@@ -58,6 +58,7 @@ jobs:
           ref: ${{ steps.checkout-ref.outputs.ref }}
           fetch-depth: 0
           persist-credentials: false
+          submodules: recursive  # Initialize git submodules for l1-contracts dependencies
 
       - name: Validate inputs
         run: |