docs(contributing): consistent capitalization (#6174)
docs(contributing): consistent capitalization (#6174)


umaar/lighthouse,deepanjanroy/lighthouse,GoogleChrome/lighthouse,umaar/lighthouse,deepanjanroy/lighthouse,umaar/lighthouse,deepanjanroy/lighthouse,umaar/lighthouse,ev1stensberg/lighthouse,wardpeet/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,deepanjanroy/lighthouse,ev1stensberg/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,wardpeet/lighthouse,deepanjanroy/lighthouse