Fix example spacing

README.md

@@ -80,17 +80,17 @@ import raylib;
 
 void main()
 {
-        // call this before using raylib
-        validateRaylibBinding();
-	InitWindow(800, 600, "Hello, Raylib-D!");
-	while (!WindowShouldClose())
-	{
-		BeginDrawing();
-		ClearBackground(Colors.RAYWHITE);
-		DrawText("Hello, World!", 400, 300, 28, Colors.BLACK);
-		EndDrawing();
-	}
-	CloseWindow();
+    // call this before using raylib
+    validateRaylibBinding();
+    InitWindow(800, 600, "Hello, Raylib-D!");
+    while (!WindowShouldClose())
+    {
+        BeginDrawing();
+        ClearBackground(Colors.RAYWHITE);
+        DrawText("Hello, World!", 400, 300, 28, Colors.BLACK);
+        EndDrawing();
+    }
+    CloseWindow();
 }
 ```