Update the URL and the description into the Geosys API Help center

[LNArtus]

Describe the bug
Change the description at the end of the Geosys Plug-in Help center;

To Reproduce
Steps to reproduce the behavior:

1. Go to the Geosys plug-in help center
2. Click on the Help button
3. Scroll down to sse all the description
4. See error at the end of the windows

Expected behavior
Change the sentence by this one :

The Geosys API developer portal is available here https://developer.geosys.com

Screenshots