Update index.md (#8546)

Minor correction in line 78 wiht to with

Author: rchavelas

files/en-us/web/javascript/reference/global_objects/object/hasownproperty/index.md

@@ -75,7 +75,7 @@ example.prop = 'exists';
 example.hasOwnProperty('prop');   // true - 'prop' has been defined
 
 example.prop = null;
-example.hasOwnProperty('prop');   // true - own property exists wtih value of null
+example.hasOwnProperty('prop');   // true - own property exists with value of null
 
 example.prop = undefined;
 example.hasOwnProperty('prop');   // true - own property exists with value of undefined
@@ -194,4 +194,4 @@ external object's `hasOwnProperty()`.
 - {{jsxref("Object.getOwnPropertyNames()")}}
 - {{jsxref("Statements/for...in", "for...in")}}
 - {{jsxref("Operators/in", "in")}}
-- [JavaScript Guide: Inheritance revisited](/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain)
+- [JavaScript Guide: Inheritance revisited](/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain)