Fixed issue #353 by changing "contructor" spelling

to "constructor"

14_Day_Component_Life_Cycles/14_component_life_cycles.md

@@ -21,7 +21,7 @@
 - [Component Life Cycles](#component-life-cycles)
   - [What is component life cycle](#what-is-component-life-cycle)
   - [Mounting](#mounting)
-    - [Contructor](#contructor)
+    - [Constructor](#constructor)
     - [getDerivedStateFromPros](#getderivedstatefrompros)
     - [Render](#render)
     - [ComponentDidMount](#componentdidmount)
@@ -95,7 +95,7 @@ const rootElement = document.getElementById('root')
 ReactDOM.render(<App />, rootElement)
 ```
 
-### Contructor
+### Constructor
 
 Nowadays we write class based-component without a constructor and we can write the state also outside the constructor. In older version React we the state used be always inside the constructor.