Update esmvaltool instructions

[rbeucher]

ACCESS Community Hive

Thank you for submitting a pull request to the ACCESS Hive Project. 🎉

More assistance is available in the how to contribute section on ACCESS-Hive

Description

Update ESMValTool instruction ahead of release.

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue, e.g. dead links)
• [X] New link / content

Checklist:

• [X] The new content is accessible and located in the appropriate section
• [X] My changes do not break navigation and do not generate new warnings
• [X] I have checked that the links are valid and point to the intended content
• [X] I have checked my code/text and corrected any misspellings
• [X] I have chosen the correct tag for the level of support provided

When your pull request is ready please request a review.

Unless there is a specific person you want to review your PR please select the reviewers team: ACCESS-Hive/reviewers. This ensures the load for reviewing pull requests is shared equitably.

[github-actions[bot]]

PR Preview :---: 🛬 Preview removed because the pull request was closed. 2023-11-15 03:29 UTC