Update examples to account for #18185

[skip sauce]

docs/components/jumbotron.md

@@ -12,7 +12,7 @@ A lightweight, flexible component that can optionally extend the entire viewport
 <div class="jumbotron">
   <h1 class="display-3">Hello, world!</h1>
   <p class="lead">This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information.</p>
-  <hr class="m-y-md">
+  <hr class="m-y-2">
   <p>It uses utility classes for typography and spacing to space content out within the larger container.</p>
   <p class="lead">
     <a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a>

docs/components/navbar.md

@@ -241,7 +241,7 @@ Our collapse plugin allows you to use a `<button>` or `<a>` to toggle hidden con
 
 {% example html %}
 <div class="collapse" id="exCollapsingNavbar">
-  <div class="bg-inverse p-a">
+  <div class="bg-inverse p-a-1">
     <h4>Collapsed content</h4>
     <span class="text-muted">Toggleable via the navbar brand.</span>
   </div>