CLS on homepage with 'Who's using posthog?'

Bug Description

Description: On the PostHog homepage (https://posthog.com/) viewed in Safari on Mac, the carousel featuring 'Create pull requests in slack', 'Fix bugs automatically', and 'Ask posthog anything' has inconsistent content heights. This causes the "Who's using PostHog?" section below to constantly shift vertically as the carousel auto-cycles, creating a jarring user experience.

Expected behavior: All carousel items should maintain consistent heights to prevent layout shift and provide a stable viewing experience.

Steps to reproduce:

1. Visit https://posthog.com/ in Safari on Mac
2. Observe the carousel section
3. Watch as it cycles through the three items
4. Notice the "Who's using PostHog?" section jumps up and down with each transition

Browser: Safari on macOS
Viewport: Desktop (not mobile view)

This is a CLS (Cumulative Layout Shift) issue that needs the carousel container or items to have normalized heights! 🦔

Debug info

- [x] PostHog Cloud, Debug information: [please copy/paste from https://us.posthog.com/settings/project-details#variables or https://eu.posthog.com/settings/project-details#variables]
- [ ] PostHog Hobby self-hosted with `docker compose`, version/commit: [please provide]
- [ ] PostHog self-hosted with Kubernetes (deprecated, see [`Sunsetting Kubernetes support`](https://posthog.com/blog/sunsetting-helm-support-posthog)), version/commit: [please provide]

Start at the PostHog homepage carousel containing “Create pull requests in slack,” “Fix bugs automatically,” and “Ask posthog anything,” then reproduce the layout shift in Safari on macOS. Inspect the carousel container and item sizing, and verify that the “Who’s using PostHog?” section remains stationary as all three items cycle.