Update description for @hey-api/openapi-ts (#711)

Author: mrlubos

src/content/tools/hey-api-openapi-ts.md

@@ -1,7 +1,8 @@
 ---
 name: '@hey-api/openapi-ts'
-description: The OpenAPI to TypeScript codegen. Generate clients, SDKs, validators, and more.
+description: OpenAPI to TypeScript codegen. Production-ready SDKs, Zod schemas, TanStack Query hooks, and 20+ plugins. Used by Vercel, OpenCode, and PayPal.
 categories:
+  - code-generators
   - converters
   - sdk-generators
 link: https://heyapi.dev/