Update Mastro to 0.8.10

[mb21]

No description provided.

[AlexanderKaran]

@mb21 Thanks for doing this, before I merge this I just need to check the Mastro tests are set up correctly with the new system and tests

[mb21]

Sure, no rush. I just optimized our HTML generator, so thought it was good to update the version.

Let me know if you need anything else. Mastro should be able to run the same tests as plain Astro (meaning Astro without client-side framework components like React and without view transitions. it's just an MPA). i.e. Mastro does server-side HTML generation and links to a detail page exactly like Astro (i.e. use plain HTML links, not <Link> or something like that). So I think it doesn't make sense to do the "Client Side Rendered Test", but Mastro should be able to do the three "Server Side" tests.