Three pages stop telling agents to install a package that does not exist - #8

Changed pages include:

• index.html - view
• 404.html - view
• 404/index.html - view
• _not-found/index.html - view
• about/index.html - view
• api-docs/index.html - view
• how-it-works/index.html - view
• marketplace/index.html - view
• merchants/index.html - view
• skill/index.html - view

There are more changes not included in the list