example: Add note about versions

exampleSite/layouts/index.html

@@ -28,7 +28,8 @@
   <div class="container mt-5">
     <h1>Bootstrap v5 Hugo Module</h1>
     <h2 class="mt-4">Dependencies</h2>
-    <table class="table table-striped table-responsive mt-5">
+    <p class="mt-4"><strong>Note:</strong> We have a replacement of github.com/gohugoio/hugo-mod-bootstrap-scss/v4 to point to the directory one level up (we do this to get correct PR previews when we update Bootstrap). The version number reflects the version in <code>go.mod</code>.</code></p>
+    <table class="table table-striped table-responsive mt-2">
       <thead>
         <tr>
           <th scope="col">#</th>