remove double project id parameter

Author: chrisreadsf

types/stagehand.ts

@@ -46,8 +46,9 @@ export interface ConstructorParams {
   /**
    * The parameters to use for creating a Browserbase session
    * See https://docs.browserbase.com/reference/api/create-a-session
+   * Note: projectId is optional here as it will use the main projectId parameter if not provided
    */
-  browserbaseSessionCreateParams?: Browserbase.Sessions.SessionCreateParams;
+  browserbaseSessionCreateParams?: Omit<Browserbase.Sessions.SessionCreateParams, 'projectId'> & { projectId?: string };
   /**
    * Enable caching of LLM responses
    * @default true