Remove _blank target from Twitter and GitHub links
Remove _blank target from Twitter and GitHub links

These were added under the assumption that it would be expected behavior for these two links to open in a new tab.

Going against default behavior isn't really a good thing, so we've opted to just make them behave normally.

VoxelDavid/voxeldavid-website,vocksel/my-website,vocksel/my-website,VoxelDavid/voxeldavid-website