Spring Fix typo: "as describe in" -> "as described in"

This fixes a simple typo.

I believe this counts as an "obvious fix" with respect to the Contributor License Agreement.

Comment From: pivotal-cla

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Comment From: pivotal-cla

@davidcostanzo Thank you for signing the Contributor License Agreement!

Comment From: sdeleuze

Merged via e1df05605907faf710fe351c0743d21c4c2fa037, thanks.