At https://github.com/nesi/research-developer-cloud, navigate to the markdown document that you wish to update or change.
On the right there is an edit button that looks like a pencil, click on that
Make the required change to the file and click on the commit changes
Within the popup provide a commit message and short description. Make sure the Create a new branch for this commit and start pull request is selected and give it a branch name.
Click on propose change to submit the change as a PR