Add a bolder font

lib/templates/cv.html.heex

@@ -7,6 +7,7 @@
     <title>Document</title>
     <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans" />
     <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300" />
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@700" />
 
     <link
       rel="stylesheet"