Remove stray back-end from ActiveJob Basics guide

The hyphenated form "back-end" only appears once in this guide; elsewhere, the un-hyphenated form "backend" is used consistently.
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Simon Dawson 2017-03-19 08:34:47 +00:00 committed by GitHub
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@ -114,7 +114,7 @@ For enqueuing and executing jobs in production you need to set up a queuing back
that is to say you need to decide for a 3rd-party queuing library that Rails should use.
Rails itself only provides an in-process queuing system, which only keeps the jobs in RAM.
If the process crashes or the machine is reset, then all outstanding jobs are lost with the
default async back-end. This may be fine for smaller apps or non-critical jobs, but most
default async backend. This may be fine for smaller apps or non-critical jobs, but most
production apps will need to pick a persistent backend.
### Backends