tests: update test-releasenotes-formatting.t with new exit codes
I didn't have the fuzzywuzzy package installed before, so I didn't
notice this test fail earlier (probably when I made
`check_incompatible_arguments` return `InputError`).
Differential Revision: https://phab.mercurial-scm.org/D9514
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}