chore: update OpenAPI spec from monorepo (#611)

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

Author: openrouter-docs-sync[bot]

.speakeasy/in.openapi.yaml

@@ -8139,7 +8139,7 @@ components:
         - 'vector_store_ids'
       type: 'object'
     FilesServerTool:
-      description: 'OpenRouter built-in server tool: read, write, edit, and list workspace files via the Files API. Requires the `x-openrouter-file-ids: openrouter` request header.'
+      description: 'OpenRouter built-in server tool: read, write, edit, and list workspace files via the Files API. Requires an authenticated request; files come from the API key''s workspace (or the default workspace for keys without one).'
       example:
         parameters: {}
         type: 'openrouter:files'