refactor(@angular/ssr): clean up comment.

The double JSDoc start sequence was visible in the docs (https://angular.dev/api/ssr/provideServerRoutesConfig). This commit fixes it.

(cherry picked from commit ccf3650)

Author: JeanMeche

packages/angular/ssr/src/routes/route-config.ts

@@ -192,7 +192,6 @@ export interface ServerRoutesConfig extends ServerRoutesConfigOptions {
  */
 export const SERVER_ROUTES_CONFIG = new InjectionToken<ServerRoutesConfig>('SERVER_ROUTES_CONFIG');
 
-/**
 /**
  * Sets up the necessary providers for configuring server routes.
  * This function accepts an array of server routes and optional configuration