Summary: Added Amplify product section

Why It Matters: This change adds a new product to the main page.

What Changed:

• Add a new heading "All your social media networks in one tab"
• Add a link "See all integrations"
• Remove the "Explore Hootsuite features: What’s in the dashboard?" section
• Add a new section about "Amplify"
• Add a new heading "Unlock unlimited reach with the only growth channel built on trust"
• Add text about Amplify and its benefits
• Add two links for Amplify: "Request a demo" and "Learn more"
• Add a new section of text about cookies at the end of the page