chore: update OpenAPI spec from monorepo (#320)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

Author: robert-j-y

.speakeasy/in.openapi.yaml

@@ -20874,12 +20874,15 @@ components:
       type: object
     URLCitation:
       example:
+        content: OpenRouter provides a unified API for accessing LLMs from multiple providers.
         end_index: 42
         start_index: 0
         title: OpenRouter Documentation
         type: url_citation
         url: https://openrouter.ai/docs
       properties:
+        content:
+          type: string
         end_index:
           type: integer
         start_index: