Changes to improve accessibility #134
Description
Change button language
- "Learn More" change to "Learn More About Samvera Applications"
- nesting of heading levels
- implement link text suggestions https://docs.google.com/document/d/1Tgg7dcsHJfLMSUXulUMWnMLV1WuWBpLpy22OQ7NMJyI/edit?usp=sharing