[Assignments] Disable form autocomplete for the Website URL field on the submissions page
When using the Website URL submission method in a Canvas Assignment, students are selecting URLs that lead to previously-submitted assignments from the form autocomplete suggestions drop-down stored by their browser rather than pasting in the URL in their paste buffer for the assignment that they just completed at an external website (Google Docs, Canva, GeoGebra, Desmos, etc.) and intended to submit. (This particularly happens with Google Docs since the URLs to specific docs are non-meaningfully named by Google and students often submit a lot of them over the course of a school year. They see a Google Doc URL as a suggestion, assume it is the one they just copied, and click on it.)
Add the autocomplete="off" property to the HTML for the existing form field to discourage browsers from autocompleting this field. I am not aware of a use case where students will be submitting the same URL to many assignments within Canvas, so this is a case when the autocomplete property should be toggled off since a unique entry is more appropriate.
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