3.21.0

• feat(nextjs): Add comment to add spotlight in Sentry.init for Next.js server config (#545)
• feat(nextjs): Pin installed Next.js SDK version to version 7 (#550)
• feat(remix): Add example page (#542)
• feat(sveltekit): Add comment for spotlight in Sentry.init for SvelteKit server hooks config (#546)
• ref(nextjs): Add note about tunnelRoute and Next.js middleware incompatibility (#544)
• ref(remix): Remove Vite dev-mode modification step (#543)