Update en.json file
Update en.json file

Refs FOO-2801
flag=none

The "flatten translation files" commit caused i18n_generate_js to
alter the en.json file. Assuming it won't change very much, this
just commits the new one.

Test plan:
* builds succeed

Change-Id: Ife3d6dd47774bcc6be1ba32d595487f2c4266585
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/294907
Reviewed-by: Jacob Burroughs <8ecea6e385af5cf9f53123f5ca17fb5fd6a6d4b2@instructure.com>
QA-Review: Charley Kline <05950d7e90ba5e3da323378368c22b3ffaaf6647@instructure.com>
Product-Review: Charley Kline <05950d7e90ba5e3da323378368c22b3ffaaf6647@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms