Update pricing demo playground link formatting

Author: jpinho

docs/pricing/README.mdx

@@ -3,7 +3,7 @@ title: Overview
 sidebar_position: 0
 ---
 
-[[API Docs](/api/pricing)] [[SDK](https://www.npmjs.com/package/@epilot/pricing-client)] [<a href="/pricing-playground/index.html" target="_blank" rel="noopener noreferrer">Pricing Demo Playground</a>]
+[[API Docs](/api/pricing)] [[SDK](https://www.npmjs.com/package/@epilot/pricing-client)] | <a href="/pricing-playground/index.html" target="_blank" rel="noopener noreferrer">Pricing Demo Playground</a>
 
 # Pricing