replace buttons to a secondary button, make images smaller, update te…

[claireclark1]

…xt to SG conventions

Problem

Need to use updated SG and update text sizes, images, and buttons
Link to GitHub Issue(s): #133

Solution

• install latest SG version
• update styling

with @jeanettedepatie

Change summary:

• Updated Spec Versions
• Tidy, well formulated change
• Another great message
• Something else I/we did

Steps to Verify:

1. check it looks good in light and dark
2. check that button links work on the outlined buttons that were added in HTML to the markdown

Screenshots (optional):