added an edit author button to the author details page

lancedamalerio_reading/bookshelf/templates/bookshelf/author_details.html

@@ -10,6 +10,10 @@
 <p>Nationality: {{ object.nationality }}</p>
 <p>Biography: {{ object.bio }}</p>
 
+<form action="./edit">
+<input type="submit" value="Edit Author">
+</form>
+
 <b>Books by {{ object }} I love:</b>
         <ul>
         {% for book in object.book_set.all %}