fix: update angular client bundle types.ts to include Promise return type in CreateClientConfig

Co-authored-by: mrlubos <12529395+mrlubos@users.noreply.github.com>

Author: Copilot

packages/openapi-ts/src/plugins/@hey-api/client-angular/bundle/types.ts

@@ -209,7 +209,7 @@ export type Client = CoreClient<RequestFn, Config, MethodFn, BuildUrlFn, SseFn>
  */
 export type CreateClientConfig<T extends ClientOptions = ClientOptions> = (
   override?: Config<ClientOptions & T>,
-) => Config<Required<ClientOptions> & T>;
+) => Config<Required<ClientOptions> & T> | Promise<Config<Required<ClientOptions> & T>>;
 
 export interface TDataShape {
   body?: unknown;