message: docs: update nav descriptions based on feedback
  PR Close
diff: {
  "url": "guide/user-input",
  "title": "User Input",
  - "tooltip": "User input triggers DOM events. We listen to those events with event bindings that funnel updated values back into our components and models."
  + "tooltip": "User input triggers DOM events. Angular listens to those events with event bindings that funnel updated values back into your app's components and models."
  },
  {
  "url": "guide/lifecycle-hooks",
  {
  "url": "guide/forms",
  "title": "Template-driven Forms",
  - "tooltip": "Create a template-driven form using directives and Angular template syntax"
  + "tooltip": "Create a template-driven form using directives and Angular template syntax."
  },
  {
  "url": "guide/form-validation",
  },
  {
  "url": "guide/dynamic-form",
  - "title": "Dynamic forms",
  + "title": "Dynamic Forms",
  "tooltip": "Render dynamic forms with FormGroup."
  }
  ]
  