fixed unclosed elements and removed p tag

Author: charnpreetsingh

index.html

@@ -173,8 +173,8 @@ <h3 class="section-header">Currently in use at</h3>
         <div class="container">
             <div class="architecturedescription">
                 <img src="assets/architectureicon2.svg" class="section-icon" alt="icon to represent jupyter architecture">
-                <h3 class="section-header">Jupyter Architecture</h2>
-                <h4 class="support-paragraph">The Jupyter Notebook is based on a set of open standards for interactive computing. Think HTML and CSS for interactive computing on the web. These open standards can be leveraged by third party developers to build customized applications with embedded interactive computing.</p>
+                <h3 class="section-header">Jupyter Architecture</h3>
+                <h4 class="support-paragraph">The Jupyter Notebook is based on a set of open standards for interactive computing. Think HTML and CSS for interactive computing on the web. These open standards can be leveraged by third party developers to build customized applications with embedded interactive computing.</h4>
             </div>
             <div class="architecturecontent row col-md-12">
                 <div class="card col-md-4">