add missing title element, fixes #11298
add missing title element, fixes #11298

test plan:
1. go to /register
2. there should be a page title

Change-Id: I71b234583bf8e84e335b905e164a0d12553b7db5
Reviewed-on: https://gerrit.instructure.com/14483
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Joe Tanner <16a9a54ddf4259952e3c118c763138e83693d7fd@instructure.com>
Reviewed-by: Mark Ericksen <776ab05fc6b68e82d2b2c63873bf56edde131809@instructure.com>

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