docs: add pull latest master deployment scripts to deployemnt steps

book/src/developers/contributing/releases/deployment.md

@@ -50,6 +50,7 @@ This step directs Ansible to use the current master version of trin. Read [about
     - [Glados](http://glados.ethportal.net/content/)
     - [Grafana](https://trin-bench.ethdevops.io/d/e23mBdEVk/trin-metrics?orgId=1)
 - Activate the virtual environment in the cluster repo: `. venv/bin/activate`
+- Make sure you've pulled the latest master branch of the deployment scripts, to include any recent changes: `git pull origin master`
 - Go into Portal section of Ansible: `cd portal-network/trin/ansible/`
 - Run the deployment: `ansible-playbook playbook.yml --tags trin`
 - Wait for completion