fix docs re update() method

Signed-off-by: Grant Ramsay <seapagan@gmail.com>

README.md

@@ -125,8 +125,8 @@ for user in results:
     print(f"User: {user.name}, Age: {user.age}")
 
 # Update a record
-user.age = 31
-db.update(User,user)
+new_user.age = 31
+db.update(new_user)
 
 # Delete a record
 db.delete(User, new_user.pk)

docs/guide/data-ops.md

@@ -56,12 +56,12 @@ See [Filtering Results](filtering.md) for more advanced filtering options.
 ## Updating Records
 
 You can update records in the database by modifying the fields of the model
-instance and then calling the `update()` method. You need to pass the model
-class and the instance to the method:
+instance and then calling the `update()` method. You just pass the model
+instance to the method:
 
 ```python
 user.age = 26
-db.update(User, user)
+db.update(user)
 ```
 
 ## Deleting Records

docs/guide/guide.md

@@ -113,12 +113,11 @@ returned.
 ## Updating Records
 
 Records can be updated seamlessly. Simply modify the fields of the model
-instance and call the `update()` method, passing the model class and the updated
-instance:
+instance and pass that to the `update()` method:
 
 ```python
 user.age = 31
-db.update(User, user)
+db.update(user)
 ```
 
 ## Deleting Records

docs/quickstart.md

@@ -26,23 +26,23 @@ db.create_table(User)
 
 # Insert a record
 user = User(name="John Doe", age=30)
-new_record = db.insert(user)
+new_user = db.insert(user)
 
 # Query records
 results = db.select(User).filter(name="John Doe").fetch_all()
 for user in results:
     print(f"User: {user.name}, Age: {user.age}, Admin: {user.admin}")
 
 # Update a record
-user.age = 31
-db.update(User, user)
+new_user.age = 31
+db.update(new_user)
 
 results = db.select(User).filter(name="John Doe").fetch_one()
 
 print("Updated age:", results.age)
 
 # Delete a record
-db.delete(User, new_record.pk)
+db.delete(User, new_user.pk)
 ```
 
 See the [Guide](guide/guide.md) for more detailed information on how to use `SQLiter`.