Update 00_intro.html

public/home/chapters/00_intro.html

@@ -31,7 +31,7 @@
             <!--<div class="chapter">
                 <h3>INTRO</h3>
             </div>-->
-            <div class="row" style="margin-bottom:2em">
+            <div class="row">
                 <!-- <div class="col-sm-1 p-1" style="height:0px;padding-top:0px !important;padding-bottom:0px !important;">
                 </div> -->
                 <div class="col-sm-6 p-6 ">