Fix hrefs for github, twitter and vk links in Links component.
Fix hrefs for github, twitter and vk links in Links component.

nicklanasa/nicklanasa.github.io,wpioneer/gatsby-starter-lumen,alxshelepenok/gatsby-starter-lumen,renegens/blog,ochaloup/blog.chalda.cz,Chogyuwon/chogyuwon.github.io,ochaloup/blog.chalda.cz,hb-gatsby/gatsby-starter-lumen,nicklanasa/nicklanasa.github.io,maxgrok/maxgrok.github.io,maxgrok/maxgrok.github.io,alxshelepenok/gatsby-starter-lumen,Chogyuwon/chogyuwon.github.io,renegens/blog