docs(releasing): document the LH Release Process (#4201)
docs(releasing): document the LH Release Process (#4201)

* docs(releasing): document the LH Release Process

* feedback

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