Build with network-protocol-staging

Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>

.gitlab/pipeline/build.yml

@@ -18,7 +18,7 @@ build-linux-stable:
     # Ensure we run the UI tests.
     RUN_UI_TESTS: 1
   script:
-    - time cargo build --locked --profile testnet --features pyroscope,fast-runtime --bin polkadot --bin polkadot-prepare-worker --bin polkadot-execute-worker
+    - time cargo build --locked --profile testnet --features pyroscope,fast-runtime,network-protocol-staging --bin polkadot --bin polkadot-prepare-worker --bin polkadot-execute-worker
     # pack artifacts
     - mkdir -p ./artifacts
     - VERSION="${CI_COMMIT_REF_NAME}" # will be tag or branch name