fix github issues

[grmbyrn]

• In order to prevent long URLs in links and list items from overflowing the page, add :

  word-wrap: break-word;
  word-break: break-all;
  overflow-wrap: break-word;
  white-space: normal;

• Remove word-break: break-all; from links and list items which don't require it.
• Highlight ToC #81
• Build error: TypeError: Cannot read properties of undefined (reading 'relatedPosts') #80
• Ask the designer how to implement a link inside a key feature card #42
• Enable second level of indentation in TableOfContents section #58
• v1 error page in v2 #71
• Fake links in homepage #84

[josecelano]

ACK ebca18396c8e578f1693ae077a7bb48e6aebe3b4