Update various components styles

[ginny-d]

Here's a list of the Docs site components to update in styling:

• [ ] Link cards
• [ ] Next/Previous cards
• [ ] Callouts
• [ ] Tables
• [ ] Buttons
• [ ] Tabs
• [ ] Install snippets
• [ ] Code snippets
• [ ] Directory
• [ ] Toggle content
• [ ] Numbered list
• [ ] Step by step