Update Illinois telephone number

Per Fiserv, this number is updated. This change had occurred
previously, but was accidentally rolled-back by
https://github.banksimple.com/BankSimple/policies/commit/7b04c2fbdc85a85
9eda26cd0033e9b176aea877e
resolve merge conflicts
Merge pull request #44 from BankSimple/updates

Update Illinois telephone number