Update Getting Started button

Author: tintou

content/_index.md

@@ -5,7 +5,7 @@ title = "The iCalendar library"
 # The homepage contents
 [extra]
 lead = '<b>libical</b> is an Open Source implementation of the iCalendar protocols and protocol data units.'
-url = "/docs/getting-started/introduction/"
+url = "/docs"
 url_button = "Get started"
 repo_version = "@version_3@ and @version_4@"
 repo_license = "MPL v2.0 or LGPL v2.1 —"