Update README.md

README.md

@@ -22,8 +22,8 @@ Feel free to fork this repository and pull requests!!
     - [Delegation](#Delegation)
     - [Singleton](#Singleton)
     - [Observer](#Observer)
-       - [KVO]
-       - [KVC]
+       - [KVO](#KVO)
+       - [KVC](#KVC)
 - [Code Structuring](#code-structuringarchitecture)
     - [MVC](#MVC)
     - [MVVM](#MVVM)
@@ -106,13 +106,13 @@ put .yml file into root folder and apply following code in Build Phases
 
 Check [this](https://refactoring.guru/design-patterns/swift) website for design pattern in Swift
 
-### Delegation
+## Delegation
 
 ```swift
 weak var delegate: SomeProtocol?
 ```
 
-### Singleton
+## Singleton
 
 
 ```swift
@@ -123,14 +123,16 @@ class SingletonPattern {
 }
 ```
 
-### Observer
+## Observer
 
 Check [this Site](https://www.swiftbysundell.com/articles/observers-in-swift-part-1/) for more info
 
-~~The observer pattern lets one object observe changes on another object. Apple added language-level support for this pattern in Swift 5.1 with the addition of Publisher in the Combine framework.~~
-
 TBD
 
+## KVO
+
+## KVC
+
 <img src = "https://github.com/jphong1111/Useful_Swift/blob/main/Images/observer.png" />
 
 ## Code Structuring(Architecture)