Typo in new RedisCacheStore docs

[josephpage]

In the edge documentation I found that the wrong keyword is used for this parameter.
Instead of cache: false, it should be compress: false

Thanks !

[rails-bot]

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[rails-bot]

Warning

• Pull requests are usually filed against the master branch for this repo, but this one is against 5-2-stable. Please double check that you specified the right target!

[rafaelfranca]

Can you rebase against the master branch? All PRs should be to the master branch unless it is an issue only in the stable branch and this is not the case here.

[jeremy]

Cherry-picked c01c38e ❤️ Thanks @josephpage !

[josephpage]

Thanks @jeremy and @rafaelfranca !