bump ruby version for fake-sqs so it will actually build
bump ruby version for fake-sqs so it will actually build

Change-Id: I79660f62dc68b15bf348016315409493c18e9a00
Reviewed-on: https://gerrit.instructure.com/101886
Reviewed-by: Bryan Petty <33564f6eff3d808d3eaaa056a1631fdcde5faed6@instructure.com>
Product-Review: Tyler Pickett <3f20fcf21b1970c94966160adcf831eedd808a06@instructure.com>
QA-Review: Tyler Pickett <3f20fcf21b1970c94966160adcf831eedd808a06@instructure.com>
Tested-by: Tyler Pickett <3f20fcf21b1970c94966160adcf831eedd808a06@instructure.com>

instructure/dockerfiles,instructure/dockerfiles,instructure/dockerfiles,instructure/dockerfiles