Fix small issue

Author: alexpeev9

chapter-00-preface.md

@@ -23,7 +23,7 @@ The free course for beginners in SoftUni is suitable for **school students** (of
 
 For this book, we chose **JavaScript**, because it is a **modern** language for high-level programming and at the same time it is easy to learn and suitable for **beginners**. As a use **JavaScript** is **widespread**, with a well-developed ecosystem, numerous libraries, and technological frameworks, and therefore gives many **prospects** for development. **JavaScript** combines the paradigms of procedural, functional, and object-oriented programming in a modern way with easy-to-use syntax. In the book, we'll use the **JavaScript language** and the **Visual Studio Code** development environment, which is available for free from Microsoft.
 
-As we will explain later, **the programming language with which we start is not essential**, but we still need to use some programming language, and in this book, we have chosen **JavaScript**. The book can also be found translated in other programming languages such as Java and C# (see https://csharp-book.softuni.bg).
+As we will explain later, **the programming language with which we start is not essential**, but we still need to use some programming language, and in this book, we have chosen **JavaScript**. The book can also be found translated in other programming languages such as Java and C# (see https://csharp-book.softuni.org).
 
 ## The Book in Other Programming Languages: Java, C#, C++, Python