fix: use solid instead of solid@latest in SolidStart getting started - #1467

Changed pages include:

• index.html - view
• quick-start.html - view
• solid-meta.html - view
• solid-meta/index.html - view
• solid-router.html - view
• solid-router/index.html - view
• solid-start.html - view
• solid-start/index.html - view
• advanced-concepts/fine-grained-reactivity.html - view
• concepts/context.html - view

There are more changes not included in the list