bump encrypted_cookie_store

it has a rails 4 fix

Change-Id: I059d0d59ceb9db3e1ce6fe03c992d26470858d43
Reviewed-on: https://gerrit.instructure.com/42077
Reviewed-by: James Williams  <jamesw@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>