fix: else-if-blocks on tutorial

[minkyngkm]

Done

• Fix Tutorial/else-if-blocks Show me/Reset button is not working properly #9335
• Fixed Show me button is not showing on /tutorial/else-if-blocks
• https://learn.svelte.dev/tutorial/else-if-blocks was referred for fix.

QA

• Go to /tutorial/else-blocks
• Check Show me/Reset buttons are working properly
  (I had a problem QAing on Chrome. It should work on Firefox)

Svelte compiler rewrite

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• Run the tests with pnpm test and lint the project with pnpm lint

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[dummdidumm]

Thank you!