Link redirects

Created by: 22nds

Checked the links on the page and several are being redirected so they need to be updated on the site:

http://www.outreachy.org/ -> https://www.outreachy.org/ http://up-for-grabs.net/ -> https://up-for-grabs.net/ https://www.meetup.com/opensourceladies/ -> https://www.meetup.com/opensourcediversity/