docs(bug-labels): Updating "good first bug" (#3535)
docs(bug-labels): Updating "good first bug" (#3535)

Per label change, updating "good first bug" to "good first issue"
deepanjanroy/lighthouse,deepanjanroy/lighthouse,wardpeet/lighthouse,ev1stensberg/lighthouse,mixed/lighthouse,ev1stensberg/lighthouse,ev1stensberg/lighthouse,GoogleChrome/lighthouse,mixed/lighthouse,wardpeet/lighthouse,deepanjanroy/lighthouse,GoogleChrome/lighthouse,umaar/lighthouse,ev1stensberg/lighthouse,deepanjanroy/lighthouse,umaar/lighthouse,tkadlec/lighthouse,mixed/lighthouse,tkadlec/lighthouse,mixed/lighthouse,wardpeet/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,tkadlec/lighthouse,deepanjanroy/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,tkadlec/lighthouse,umaar/lighthouse,wardpeet/lighthouse