docs(router): fix syntax in code example of comment block (#10026)

modules/@angular/router/src/interfaces.ts

@@ -31,7 +31,7 @@ import {ActivatedRouteSnapshot, RouterStateSnapshot} from './router_state';
  *     component: Team,
  *     canActivate: [CanActivateTeam]
  *   }])
- * );
+ * ]);
  * ```
  *
  * You can also provide a function with the same signature instead of the class:
@@ -45,7 +45,7 @@ import {ActivatedRouteSnapshot, RouterStateSnapshot} from './router_state';
  *     component: Team,
  *     canActivate: ['canActivateTeam']
  *   }])
- * );
+ * ]);
  * ```
  *
  * @stable
@@ -77,7 +77,7 @@ export interface CanActivate {
  *     component: Team,
  *     canDeactivate: [CanDeactivateTeam]
  *   }])
- * );
+ * ]);
  * ```
  *
  * You can also provide a function with the same signature instead of the class:
@@ -91,7 +91,7 @@ export interface CanActivate {
  *     component: Team,
  *     canActivate: ['canDeactivateTeam']
  *   }])
- * );
+ * ]);
  * ```
  *
  * @stable
@@ -125,7 +125,7 @@ export interface CanDeactivate<T> {
  *       team: TeamResolver
  *     }
  *   }])
- * );
+ * ]);
  * ```
  *
  * You can also provide a function with the same signature instead of the class.