Ruby: update benign test output

API graph tests only report the shortest path, and a new shortest path has appeared, but the old path is still there, so this is not a regression.

Author: asgerf

ruby/ql/test/library-tests/frameworks/ActionDispatch.expected

@@ -55,7 +55,7 @@ underscore
 | LotsOfCapitalLetters | lots_of_capital_letters |
 | invalid | invalid |
 mimeTypeInstances
-| action_dispatch/mime_type.rb:2:6:2:28 | Use getMember("Mime").getMethod("fetch").getReturn() |
+| action_dispatch/mime_type.rb:2:6:2:28 | Use getMember("Mime").getContent(element_text/html) |
 | action_dispatch/mime_type.rb:3:6:3:32 | Use getMember("Mime").getMember("Type").getMethod("new").getReturn() |
 | action_dispatch/mime_type.rb:4:6:4:35 | Use getMember("Mime").getMember("Type").getMethod("lookup").getReturn() |
 | action_dispatch/mime_type.rb:5:6:5:43 | Use getMember("Mime").getMember("Type").getMethod("lookup_by_extension").getReturn() |