Add variables content (#1592)

* Update 101-variables.md

* Update content/roadmaps/109-golang/content/100-go-basics/101-variables.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/109-golang/content/100-go-basics/101-variables.md

@@ -1 +1,8 @@
-# Variables
+# Variables in Go
+
+Variable is the name given to a memory location to store a value of a specific [type](https://golangbot.com/types/). Go provides multiple ways to declare and use variables.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://go.dev/tour/basics/8'>Go Variables</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://gobyexample.com/variables'>Go by Example: Variables</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.w3schools.com/go/go_variables.php'>w3schools Go variables</BadgeLink>