Glossary Updates

[DerekMelchin]

Expected Behavior

The glossary contains definitions for risk free interest rate and sortino ratio

Actual Behavior

Not defined

Checklist

• [x] I have completely filled out this template
• [x] I have confirmed that this issue exists on the current master branch
• [x] I have confirmed that this is not a duplicate issue by searching issues

[AlexCatarino]

Closed by 2f16190