docs: fix broken plugin example link (#9524)
docs: fix broken plugin example link (#9524)


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