Summary: Tinybird adds "Managed ClickHouse" to product menu

Why It Matters: Tinybird added a new link in their product menu. This link is for "Managed ClickHouse".

What Changed:

• The footer menu under "Product" now includes "Managed ClickHouse".
• The "Built for speed" section title changed to "Who is Tinybird for? Built for developers".
• The "Why Tinybird?" section title changed to "Why Tinybird? Why not use ClickHouse directly?".
• The "What do I need to know before I start?" section title changed to "How does it work?".
• The content under "How does it work?" was shortened.
• The number of empty brackets [] changed from 6 to 5.