update docs

Author: lazabogdan

docs/src/html/pages/sidebar-menu/utilities.html

@@ -79,7 +79,7 @@ <h1>{{ title }}</h1>
         You can customize sidebar utilities with the following Sass variables.
       </blockquote>
 
-      <h2>.sm-condensed</h2>
+      <h3>.sm-condensed</h3>
       <div class="table-responsive">
         <table class="table table-sm">
           <thead>
@@ -104,7 +104,7 @@ <h2>.sm-condensed</h2>
         </table>
       </div>
 
-      <h2>.sm-bordered</h2>
+      <h3>.sm-bordered</h3>
       <div class="table-responsive">
         <table class="table table-sm">
           <thead>
@@ -129,7 +129,7 @@ <h2>.sm-bordered</h2>
         </table>
       </div>
 
-      <h2>.sm-item-bordered</h2>
+      <h3>.sm-item-bordered</h3>
       <div class="table-responsive">
         <table class="table table-sm">
           <thead>
@@ -164,7 +164,7 @@ <h2>.sm-item-bordered</h2>
         </table>
       </div>
 
-      <h2>.sm-active-button-bg</h2>
+      <h3>.sm-active-button-bg</h3>
       <div class="table-responsive">
         <table class="table table-sm">
           <thead>
@@ -209,7 +209,7 @@ <h2>.sm-active-button-bg</h2>
         </table>
       </div>
 
-      <h2>.sm-active-button-bg and .sm-icons-block</h2>
+      <h3>.sm-active-button-bg and .sm-icons-block</h3>
       <div class="table-responsive">
         <table class="table table-sm">
           <thead>