Neaten up pr template (#1369)

This PR neatens up our PR template.

Github struggles to render lists with gaps in. Could we make it neater?


![image](https://github.com/tldraw/tldraw/assets/15892272/8dccecc2-48be-419f-9272-ef1e19bd8915)


### Change Type

<!-- 💡 Indicate the type of change your pull request is. -->
<!-- 🤷‍♀️ If you're not sure, don't select anything -->
<!-- ✂️ Feel free to delete unselected options -->

<!-- To select one, put an x in the box: [x] -->

- [ ] `patch` — Bug Fix
- [ ] `minor` — New Feature
- [ ] `major` — Breaking Change
---
- [ ] `dependencies` — Dependency Update (publishes a `patch` release,
for devDependencies use `internal`)
---
- [ ] `documentation` — Changes to the documentation only (will not
publish a new version)
- [ ] `tests` — Changes to any testing-related code only (will not
publish a new version)
- [x] `internal` — Any other changes that don't affect the published
package (will not publish a new version)

### Release Notes

- None: internal

.github/pull_request_template.md

@@ -11,9 +11,7 @@ Describe what your pull request does. If appropriate, add GIFs or images showing
 - [ ] `patch` — Bug Fix
 - [ ] `minor` — New Feature
 - [ ] `major` — Breaking Change
-
 - [ ] `dependencies` — Dependency Update (publishes a `patch` release, for devDependencies use `internal`)
-
 - [ ] `documentation` — Changes to the documentation only (will not publish a new version)
 - [ ] `tests` — Changes to any testing-related code only (will not publish a new version)
 - [ ] `internal` — Any other changes that don't affect the published package (will not publish a new version)