Merge pull request plone#1222 from plone/opengraph

Update conf.py ogp_site_url

Author: ksuess

docs/conf.py

@@ -174,7 +174,7 @@
 
 # -- OpenGraph configuration ----------------------------------
 
-ogp_site_url = "https://training.plone.org/5/"
+ogp_site_url = "https://docs.plone.org/"
 ogp_description_length = 200
 ogp_image = "https://docs.plone.org/_static/Plone_logo_square.png"
 ogp_site_name = "Plone Documentation"