Forgot password not case-sensitive

[TaiWilkin]

Overview

When users enter their email to retrieve a forgotten password,
the search to confirm their email is not case-sensitive.

Connects #968

Demo

Testing Instructions

• Checkout this branch
• Run vagrant ssh and ./scripts/server
• Go to 'login' and select 'forgot password'
• Enter your email with capitalization that doesn't match how you originally capitalized it when you signed up
• The forgot password email should 'send' successfully (check the console to see it printed there)

Checklist

• fixup! commits have been squashed
• CI passes after rebase
• CHANGELOG.md updated with summary of features or fixes, following Keep a Changelog guidelines

[jwalgran]

Nice, simple fix. I realized while reviewing this that case sensitivity is a larger issue and created #972 to continue the work.

A reminder to work complete the PR checklist before merging this PR. Since is a a simple, 1-commit change consider squashing the README update with the functional commit.