update README.md

README.md

@@ -38,7 +38,7 @@ In the above pattern `Name` and `Email` fields are excluded.
 
 ### AUTO INCREMENT
 
-If auto_increment attribute is assigned to the primary key etc, make sure to set `AUTO_INCREMENT` in model struct.
+If auto_increment attribute is assigned to the primary key, make sure to set `gorm:"AUTO_INCREMENT"` tag in model struct.
 
 ```go
 type fakeTable struct {
@@ -47,7 +47,7 @@ type fakeTable struct {
 }
 ```
 
-This is necessary to exclude the auto_increment column from insertion and be numbered by database system. The reason for this requirement is that if all primary keys are excluded, only the surrogate key like auto_increment can be inserted and natural key cannot at all.
+This is necessary to exclude the auto_increment column from insertion and be numbered by database. The reason for this requirement is that if all primary keys are excluded, only surrogate key like auto_increment can be inserted and natural key cannot at all.
 
 ### Feature