theme: upgrade to latest v4.6-dev - fix spacing with `link_authors`
theme: upgrade to latest v4.6-dev - fix spacing with `link_authors`

WenxuanZhang/WenxuanZhang.github.io,WenxuanZhang/WenxuanZhang.github.io,MrPike/Pike.im,sebastian-claici/sebastian-claici.github.io,xuebinsu/xuebinsu.github.io,MrPike/Pike.im,MrPike/Pike.im,artivis/artivis.github.io,tmquan/tmquan.github.io,tmquan/tmquan.github.io,emilioj/homepage