docs: Fix a typo and spelling in Svelte 5 breaking changes doc

[kyoshino]

Found a typo on the Svelte 5 Preview site — Breaking changes:

Both return an object with the exports of the component and potentially property accessors (if compiled with accesors: true).

This PR adds a missing “s” in accesors: true.

Also, it’s not a typo but there is an inconsistent spelling:

The change from classes towards functions is also reflected in the typings: SvelteComponent, the base class from Svelte 4, is deprecated in favor of the new Component type which defines the function shape of a Svelte component.

I believe Svelte docs are consistently written in British English (for example, the Runes page says “initialisation”, not “initialization”), and the Event handlers page does say “favour”. So I’ve added a “u” to “favor”.

[changeset-bot]

⚠️ No Changeset found

Latest commit: c6aa2d1

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[Rich-Harris]

thank you!