Updates

• Add How-to: Create accessible forms.
• Update our featured resource to be Introduction to Web Accessibility.
• Add Alicia Jarvis as a maintainer.
• Add persistent expand/collapse state to Table of Contents components.
• Add new resources.
• Add redirects.
• Fixed color contrast issues.
• Update our code font.
• Update our secondary font.

Thank you

• @HarcourtHamsa
• @ljgoslin
• @malchata
• @rianrietveld