Fix documentation: Honeybadger => Rollbar

Changed in pliny-template: https://github.com/interagent/pliny-template/commit/06f5d2166525028fa03e03ee62a92828ee84508b
Merge pull request #57 from fdr/patch-1

Fix documentation: Honeybadger => Rollbar

https://github.com/interagent/pliny-template/pull/101