Update the list of known candidate revisions

Author: actions-user

candidate-snaps-review/candidate.yml

@@ -10,8 +10,7 @@ epiphany: []
 evince:
 - 1065
 factory-reset-tools: []
-firefox:
-- 8364
+firefox: []
 firmware-updater: []
 five-or-more:
 - 210