docs-util: add publishable api key header parameter to store routes OAS (#10747)

* docs-util: add publishable api key header parameter to store routes OAS

* fix oas

www/packages/docs-ui/src/utils/capitalize.ts

@@ -1,3 +1,3 @@
 export function capitalize(str: string): string {
-  return str.charAt(0).toUpperCase() + str.slice(1).toLowerCase()
+  return str.charAt(0).toUpperCase() + str.slice(1)
 }