Update golang.json

Duplicate text correction

Author: irezaul

data/golang.json

@@ -373,7 +373,7 @@
         {
             "title": "পদ্ধতি ( Methods ) | রিসিভার ( Receivers )",
             "items": [{
-                    "code": "type Vertex struct {"
+                    "code": "type Devsonk struct {"
                 },
                 {
                     "code": "X, Y float64"
@@ -382,16 +382,16 @@
                     "code":"}"
                 },
                 {
-                    "code": "func (v Vertex) Abs() float64 {"
+                    "code": "func (v Devsonk) Abs() float64 {"
                 },
                 {
-                    "code": "func (v Vertex) Abs() float64 {"
+                    "code": "return math.Sqrt(v.X * v.X + v.Y * v.Y)"
                 },
                 {
                     "code": "}"
                 },
                 {
-                    "code": "v := Vertex{1, 2}"
+                    "code": "v := Devsonk{1, 2}"
                 },
                 {
                     "code": "v.Abs()"