added path for edit author page

lancedamalerio_reading/bookshelf/urls.py

 from django.urls import path
 from .views import (HomeView, BookListView, BookDetailView, AuthorListView, AuthorDetailView, 
-                    BookCreateView, AuthorCreateView, BookUpdateView)
+                    BookCreateView, AuthorCreateView, BookUpdateView, AuthorUpdateView)
 
 #url for bookshelf
 
@@ -13,6 +13,7 @@ urlpatterns = [
     path('authors/', AuthorListView.as_view(), name = 'author-list'),
     path('authors/<int:pk>/details', AuthorDetailView.as_view(), name = 'author-details'),
     path('authors/add/', AuthorCreateView.as_view(), name="new-author"),
+    path("authors/<int:pk>/edit", AuthorUpdateView.as_view(), name="update-author"),
 
 ]