Add documentation about the Rails backtrace cleaner (#296)
Add documentation about the Rails backtrace cleaner (#296)

* Add documentation about the Rails backtrace cleaner

* Tweak Rails backtrace cleaner section

Co-authored-by: Tom de Bruijn <96835dd8bfa718bd6447ccc87af89ae1675daeca@tomdebruijn.com>

appsignal/appsignal-docs