added behaviors documentation on README.md

[tatoberres]

Issue 142: https://github.com/publiclab/plotsbot/issues/142

added:

• Approve
• Version

dont added:

• Heat (hddtemp lack of maintenance causes to be removed from Debian 12)
• Unresponsive (cause its purpose is not to respond)

modified:

• FTO (added a second parameter on keyword: "repo-name")