Change dbset name to Books

docs/en/Tutorials/AspNetCore-Mvc/Part-I.md

@@ -84,7 +84,7 @@ EF Core requires you to relate entities with your DbContext. The easiest way to
 ````C#
     public class BookStoreDbContext : AbpDbContext<BookStoreDbContext>
     {
-        public DbSet<Book> Book { get; set; }
+        public DbSet<Book> Books { get; set; }
 		...
     }
 ````

samples/BookStore/src/Acme.BookStore.EntityFrameworkCore/EntityFrameworkCore/BookStoreDbContext.cs

@@ -10,9 +10,10 @@ namespace Acme.BookStore.EntityFrameworkCore
     [ConnectionStringName("Default")]
     public class BookStoreDbContext : AbpDbContext<BookStoreDbContext>
     {
-        public DbSet<Book> Book { get; set; }
         public DbSet<AppUser> Users { get; set; }
 
+        public DbSet<Book> Books { get; set; }
+
         public BookStoreDbContext(DbContextOptions<BookStoreDbContext> options)
             : base(options)
         {