feat: add useful links for learning pointers in golang (#5747)

* feat: add useful links for learning pointers in golang

src/data/roadmaps/golang/content/101-go-advanced/112-pointers.md

@@ -1,3 +1,9 @@
 # Go Pointers
 
 Go pointers are a powerful feature that allows you to work with memory addresses directly. They are used to store the memory address of a variable. This can be useful when you need to pass a large amount of data to a function or when you need to modify the value of a variable inside a function.
+
+Visit the following resources to learn more:
+
+- [Pointers](https://go.dev/tour/moretypes/1)
+- [Go by Example: Pointers](https://gobyexample.com/pointers)
+- [YouTube: Pointers](https://www.youtube.com/watch?v=a4HcEsJ1hIE)