docs: update casing (#15321)

Author: realguse

README.md

@@ -5,7 +5,7 @@
 	</picture>
 </a>
 
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+[![License](https://img.shields.io/npm/l/svelte.svg)](LICENSE.md) [![Chat](https://img.shields.io/discord/457912077277855764?label=chat&logo=discord)](https://svelte.dev/chat)
 
 ## What is Svelte?