integration-tests: add 10s delay for chain to start

.github/workflows/run-network-tests.yml

@@ -207,6 +207,7 @@ jobs:
           docker-compose up -d joystream-node
       - name: Configure and start development storage node
         run: |
+          sleep 10
           DEBUG=* yarn storage-cli dev-init
           docker-compose up -d colossus
       - name: Test uploading