confluence update_plugin_license

[dustypc101]

It appears that the url in the confluence.py line 2615 is not formed correctly.
Currently it is: url = "/plugins/1.0/{plugin_key}/license".format(plugin_key=plugin_key) It should be:
url = "rest/plugins/1.0/{plugin_key}-key/license".format(plugin_key=plugin_key)

At least that is what works with my on prem version of confluence.
Awesome library! Thank you!

[gonchik]

Hello @dustypc101 , you're right.

if you have time you can send the PR.

Cheers, GT