Use simple example (#2561)

This PR replaces the stackblitz embed with a simple codesandbox embed on
our docs site.

### Change Type

- [ ] `patch` — Bug fix
- [ ] `minor` — New feature
- [ ] `major` — Breaking change
- [ ] `dependencies` — Changes to package dependencies[^1]
- [ x] `documentation` — Changes to the documentation only[^2]
- [ ] `tests` — Changes to any test code only[^2]
- [ ] `internal` — Any other changes that don't affect the published
package[^2]
- [ ] I don't know

apps/docs/content/getting-started/examples.mdx

@@ -8,8 +8,8 @@ order: 3
 
 Here's a [very simple sandbox](https://codesandbox.io/s/tldraw-example-canary-2lrzmy) showing the tldraw component.
 
+<Embed src="https://codesandbox.io/embed/2lrzmy?view=Editor+%2B+Preview&module=%2Fsrc%2Fapp.tsx" />
+
 You can also find simple [framework-specific examples](https://github.com/tldraw/examples). For a multiplayer example using a collaboration backend, see our [Yjs example](https://github.com/tldraw/tldraw-yjs-example).
 
-For more specific examples of how to use the tldraw component, check out the [tldraw repository's examples app](https://github.com/tldraw/tldraw/blob/main/apps/examples/src). The [tldraw repo](https://github.com/tldraw/tldraw) has more information about running the examples locally. The examples are also available in a [sandbox](https://stackblitz.com/github/tldraw/tldraw/tree/examples?file=src%2Findex.tsx) shown below:
-
-<Embed src="https://stackblitz.com/github/tldraw/tldraw/tree/examples?embed=1&file=src%2Findex.tsx&theme=dark" />
+For more specific examples of how to use the tldraw component, check out the [tldraw repository's examples app](https://github.com/tldraw/tldraw/blob/main/apps/examples/src). The [tldraw repo](https://github.com/tldraw/tldraw) has more information about running the examples locally.