Update README.md (#509)

Author: antoinebhs

README.md

@@ -33,7 +33,6 @@ you need to follow the steps below:
 -   Update to the new version in [package.json](https://github.com/gridsuite/commons-ui/blob/main/package.json) (example `0.6.0`)
 -   Build it: `npm install`
 -   Commit the package.json and package-lock.json files, push to a branch, make a PR, have it reviewed and merged to main.
--   Pull and checkout main on your last commit.
 -   [Make a release](https://github.com/gridsuite/commons-ui/releases/new) on GitHub by creating a new tag on the last commit. On the release creation page:
     - In "Choose a tag": type the tag you want to create (ex.: v0.6.0) and select "create new tag"
     - In "Target": click on "recent commit" tab and select your release commit