chore: update OpenAPI spec from monorepo (#511)

## OpenAPI Spec Update

Automated update of the OpenAPI specification from the monorepo release.

This PR was created by the SDK release workflow and will be merged
automatically.

[Workflow
run](https://github.com/OpenRouterTeam/openrouter-web/actions/runs/28133624320)

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

Author: openrouter-docs-sync[bot]

.speakeasy/in.openapi.yaml

@@ -4016,6 +4016,7 @@ components:
         - google-ai-studio
         - google-vertex
         - groq
+        - heygen
         - inception
         - inceptron
         - inferact-vllm
@@ -12477,6 +12478,7 @@ components:
                 - Google
                 - Google AI Studio
                 - Groq
+                - HeyGen
                 - Inception
                 - Inceptron
                 - InferenceNet
@@ -17887,6 +17889,7 @@ components:
         - Google
         - Google AI Studio
         - Groq
+        - HeyGen
         - Inception
         - Inceptron
         - InferenceNet
@@ -18129,6 +18132,10 @@ components:
           additionalProperties:
             nullable: true
           type: object
+        heygen:
+          additionalProperties:
+            nullable: true
+          type: object
         huggingface:
           additionalProperties:
             nullable: true
@@ -18699,6 +18706,7 @@ components:
             - Google
             - Google AI Studio
             - Groq
+            - HeyGen
             - Inception
             - Inceptron
             - InferenceNet
@@ -24387,6 +24395,7 @@ paths:
               - google-ai-studio
               - google-vertex
               - groq
+              - heygen
               - inception
               - inceptron
               - inferact-vllm