fix: wrong link to article in Slices section (#9263)

Co-authored-by: Sergei Prokhorov <s.prokhorov@protonmail.ch>

public/roadmap-content/golang.json

@@ -437,7 +437,7 @@
       },
       {
         "title": "The new() vs make() Functions in Go",
-        "url": "https://nitish08.medium.com/loops-in-golang-d44fb39b08e",
+        "url": "https://www.freecodecamp.org/news/new-vs-make-functions-in-go/",
         "type": "article"
       },
       {
@@ -3436,4 +3436,4 @@
       }
     ]
   }
-}
+}

src/data/roadmaps/golang/content/slices@3aoMFQXIh3Qdo04isHwe_.md

@@ -5,5 +5,5 @@ Dynamic arrays built on top of arrays. Reference types with length and capacity.
 Visit the following resources to learn more:
 
 - [@official@make](https://go.dev/tour/moretypes/13)
-- [@article@The new() vs make() Functions in Go](https://nitish08.medium.com/loops-in-golang-d44fb39b08e)
-- [@article@Slice Arrays Correctly](https://labex.io/tutorials/go-how-to-slice-arrays-correctly-418936)
+- [@article@The new() vs make() Functions in Go](https://www.freecodecamp.org/news/new-vs-make-functions-in-go/)
+- [@article@Slice Arrays Correctly](https://labex.io/tutorials/go-how-to-slice-arrays-correctly-418936)