replace em -> strong

avoids loading the italic font just for one line of text, will revisit in future

index.html

@@ -17,7 +17,7 @@
           </h1>
         </header>
 
-        <p><em>Software engineer extraordinaire</em></p>
+        <p><strong>Software engineer extraordinaire</strong></p>
 
         <p>I have been working with computers for over twenty years and love to solve technical and business problems for a fair price.</p>
         <p>