Add resource for constr (#2920)

content/roadmaps/106-javascript/content/101-javascript-variables/100-variable-declarations/102-const.md

@@ -3,6 +3,7 @@
 Constants are block-scoped, much like variables declared using the `let` keyword. The value of a constant can't be changed through reassignment (i.e. by using the assignment operator), and it can't be redeclared (i.e. through a variable declaration). However, if a constant is an object or array its properties or items can be updated or removed.
 
 <ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.codeguage.com/courses/js/constants'>JavaScript Constants - CodeGuage</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const'>const keyword - MDN Docs</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://javascript.info/variables'>JavaScript Variables</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.geeksforgeeks.org/how-to-declare-variables-in-different-ways-in-javascript/'>How to declare variables in different ways in JavaScript?</BadgeLink>