Summary: Dub adds Stripe free trial tracking support

Why It Matters: This update helps companies see which marketing links lead to new trial signups. It makes it easier to measure the value of a campaign before a customer actually pays.

What Changed:

• Added a new changelog entry for Stripe free trial tracking support.
• Updated the "Built to scale" section to show "Events Tracked" instead of "Clicks Tracked."
• Removed an older changelog entry about aggregated analytics to make room for the new update.