Shared Dashboard text card formatting wrong

[darkopia]

Bug Description

Bug description

When adding a text card on a shared dashboard the context is added to a span losing formatting.

How to reproduce

1. Create a dashboard with a text card with formatted content
2. share dashboard
3. text card formatting is lost

Additional context

Debug info

- [ ] 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]