Update index documentation
In !237 (merged), we updated the climate index definitions to clix-meta-0.6.0, but we still need to bring the documentation up to speed.
GitLab (git.smhi.se) will be shutdown for maintenance September 17th between 05:30-06:00 UTC
In !237 (merged), we updated the climate index definitions to clix-meta-0.6.0, but we still need to bring the documentation up to speed.