update config file

_config.yml

@@ -25,7 +25,7 @@ description: >- # this means to ignore newlines until "baseurl:"
   line in _config.yml. It will appear in your document head meta (for
   Google search results) and in your feed.xml site description.
 baseurl: "/dpg-masterclass" # the subpath of your site, e.g. /blog
-url: "https://undp-accelerator-labs.github.io" # the base hostname & protocol for your site, e.g. http://example.com
+url: "https://undp-accelerator-labs.github.io/dpg-masterclass" # the base hostname & protocol for your site, e.g. http://example.com
 twitter_username: jekyllrb
 github_username:  jekyll