chore: update OpenAPI spec from monorepo (#323)

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

Author: robert-j-y

.speakeasy/in.openapi.yaml

@@ -17358,8 +17358,8 @@ components:
       type: string
     ProviderOptions:
       description: >-
-        Provider-specific options keyed by provider slug. The options for the matched provider are spread into the
-        upstream request body.
+        Provider-specific options keyed by provider slug. Only options for the matched provider are forwarded; the rest
+        are ignored. Unrecognized keys are silently dropped.
       example:
         openai:
           max_tokens: 1000