Fixes#42192
Replaces the deprecated `getSession` call with `getClaims` in the
SolidJS tutorial documentation (`with-solidjs.mdx`).
Changes:
- `supabase.auth.getSession()` → `supabase.auth.getClaims()`
- `data.session` → `data.claims`
This follows the recommended migration pattern per the Supabase auth
docs, and is consistent with the same fix applied to the Refine tutorial
in #43006.
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Co-authored-by: Chris Chinchilla <chris.ward@supabase.io>