[website] try again to fix redirect
[website] try again to fix redirect

Summary: https://github.com/facebook/flow/commit/62fcf2e0a10f04c6b8d5e545d3e231f2b48c66a5 didn't work. I typo'd the URL (about-flow.html, not about.html), but it also didn't redirect that either so something's wrong. let's try relative paths, like the (limited) s3_website docs show.

Reviewed By: gabelevi, bhosmer

Differential Revision: D3425773

fbshipit-source-id: e7b59eb848cf41b3fb230e0dfb13a781a6092c5e

JonathanUsername/flow,popham/flow,jgrund/flow,chenglou/flow,AprilArcus/flow,fletcherw/flow,jamesgpearce/flow,ForbesLindesay/flow,cesarandreu/flow,cesarandreu/flow,nmote/flow,AgentME/flow,samwgoldman/flow,AgentME/flow,popham/flow,gabro/flow,TiddoLangerak/flow,gabelevi/flow,facebook/flow,jeffmo/flow,samwgoldman/flow,ForbesLindesay/flow,jeffmo/flow,ylu1317/flow,AgentME/flow,popham/flow,jdelStrother/flow,mroch/flow,samwgoldman/flow,samwgoldman/flow,MichaelDeBoey/flow,facebook/flow,popham/flow,gabelevi/flow,JonathanUsername/flow,cesarandreu/flow,popham/flow,chenglou/flow,AgentME/flow,jeffmo/flow,MichaelDeBoey/flow,facebook/flow,mroch/flow,JonathanUsername/flow,mroch/flow,fletcherw/flow,AprilArcus/flow,TiddoLangerak/flow,jamesgpearce/flow,gabelevi/flow,gabelevi/flow,ForbesLindesay/flow,jdelStrother/flow,jamesgpearce/flow,JonathanUsername/flow,fletcherw/flow,jgrund/flow,fletcherw/flow,ForbesLindesay/flow,jeffmo/flow,ForbesLindesay/flow,ylu1317/flow,jeffmo/flow,cesarandreu/flow,ylu1317/flow,TiddoLangerak/flow,jgrund/flow,AgentME/flow,chenglou/flow,claudiopro/flow,jdelStrother/flow,claudiopro/flow,samwgoldman/flow,ylu1317/flow,facebook/flow,AprilArcus/flow,JonathanUsername/flow,jgrund/flow,popham/flow,nmote/flow,nmote/flow,nmote/flow,claudiopro/flow,MichaelDeBoey/flow,jamesgpearce/flow,mroch/flow,chenglou/flow,jamesgpearce/flow,gabelevi/flow,mroch/flow,TiddoLangerak/flow,samwgoldman/flow,TiddoLangerak/flow,AprilArcus/flow,claudiopro/flow,AprilArcus/flow,gabelevi/flow,ylu1317/flow,gabro/flow,AprilArcus/flow,jamesgpearce/flow,nmote/flow,gabro/flow,JonathanUsername/flow,gabelevi/flow,gabro/flow,ForbesLindesay/flow,jdelStrother/flow,fletcherw/flow,chenglou/flow,jgrund/flow,jdelStrother/flow,jamesgpearce/flow,fletcherw/flow,MichaelDeBoey/flow,gabro/flow,mroch/flow,jgrund/flow,gabro/flow,MichaelDeBoey/flow,facebook/flow,jdelStrother/flow,samwgoldman/flow,jeffmo/flow,facebook/flow,chenglou/flow,facebook/flow,nmote/flow,nmote/flow,popham/flow,claudiopro/flow,JonathanUsername/flow,mroch/flow