Accessibility - Hamburger menu is missing a label

[maur1]

Current Behavior

Hamburger menu is missing a label describing it’s purpose to screen readers

Proposed Behavior

Add label to the hamburger menu describing its purpose e.g "Toggle navigation menu"

Checklist

• [x] I have read and understand the contributing guidelines
• [x] I have checked the existing issues for whether this enhancement was already requested

[cuteshaun]

I'd be happy to take this on. Let me know if it's available!