refactor: ensure all 'TODO's are consistent (#23252)

PR Close #23252

aio/content/examples/router/src/app/heroes/hero-list.component.1.ts

@@ -1,6 +1,6 @@
 // #docplaster
 // #docregion
-// TODO SOMEDAY: Feature Componetized like HeroCenter
+// TODO: Feature Componetized like HeroCenter
 import { Component, OnInit }   from '@angular/core';
 import { Router }              from '@angular/router';
 import { Observable }          from 'rxjs';

aio/content/examples/router/src/app/heroes/hero-list.component.ts

@@ -1,6 +1,6 @@
 // #docplaster
 // #docregion
-// TODO SOMEDAY: Feature Componetized like CrisisCenter
+// TODO: Feature Componetized like CrisisCenter
 // #docregion rxjs-imports
 import { Observable } from 'rxjs';
 import { switchMap } from 'rxjs/operators';