chore: update OpenAPI spec from monorepo (#461)

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

Author: openrouter-docs-sync[bot]

.speakeasy/in.openapi.yaml

@@ -20187,6 +20187,7 @@ components:
         - openai-responses-v1
         - azure-openai-responses-v1
         - xai-responses-v1
+        - meta-responses-v1
         - anthropic-claude-v1
         - google-gemini-v1
         - null