Use em dash for title seperators

src/components/GutenbergSearch.js

@@ -34,10 +34,10 @@ const Book = ({ entry }) => {
   return (
     <div>
       <div>
-        {id} {title.join(' - ')}
+        {id} {title.join(' – ')}
       </div>
       <div>{author[0]}</div>
-      <div>{language.join(' - ')}</div>
+      <div>{language.join(' – ')}</div>
       <div>
         <button onClick={handleClick}>Load</button>
       </div>