Update src/content/docs/browser-rendering/rest-api/pdf-endpoint.mdx

Co-authored-by: ToriLindsay <[email protected]>

Author: kathayl

src/content/docs/browser-rendering/rest-api/pdf-endpoint.mdx

@@ -20,7 +20,7 @@ You must provide either `url` or `html`:
 -  `url` (string)
 -  `html` (string)
 
-## Common Use Cases
+## Common use cases
 
 -  Capture a PDF of a webpage
 -  Generate PDFs, such as invoices, licenses, reports, and certificates, directly from HTML