chore: update OpenAPI spec from monorepo (#1140)

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

Author: openrouter-docs-sync[bot]

.speakeasy/in.openapi.yaml

@@ -32594,6 +32594,7 @@ components:
               - '480x720'
               - '480x854'
               - '480x1120'
+              - '496x864'
               - '540x360'
               - '560x752'
               - '640x360'
@@ -32614,6 +32615,7 @@ components:
               - '834x1112'
               - '840x360'
               - '854x480'
+              - '864x496'
               - '960x720'
               - '960x960'
               - '992x432'