bump canvas_connect to version 0.3.3

test plan:
* using rails 3, plugin settings should render for adobe connect

fixes #CNVS-12185

Change-Id: Ie220862400eac8b9a6f7200d611eeec8a632a1c3
Reviewed-on: https://gerrit.instructure.com/33053
Reviewed-by: Cody Cutrer <cody@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Nathan Rogowski <nathan@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>