Update Platform Tools title and description - #116

Changed pages include:

• index.html - view
• 404.html - view
• content/index.html - view
• contributing/index.html - view
• docs/index.html - view
• key-dates/index.html - view
• onboarding/index.html - view
• resources/index.html - view
• docs/automation-health/index.html - view
• docs/concepts/components/index.html - view

There are more changes not included in the list