feat(java): add official articles on basic syntax and update the content (#7665)

src/data/roadmaps/java/content/100-java-fundamentals/100-basic-syntax.md

@@ -1,11 +1,12 @@
 # Basic Syntax
 
-Understanding the basics is the key to a solid foundation. In this section, learn the basic terminologies, naming conventions, reserved words, conditions, functions, data structures, OOP, packages, etc.
+Understanding the basics is the key to a solid foundation. In this section, learn the basic terminologies, naming conventions, reserved keywords, expressions, statements, data structures, OOP, packages, etc.
 
 - To print output use --> System.out.println();
 - To take input from user --> Scanner or BufferedReader class can be used
 
 Visit the following resources to learn more:
 
+- [@official@Java Language Basics](https://dev.java/learn/language-basics)
 - [@video@Java - Basic Syntax](https://www.youtube.com/watch?v=81piDKqPxjQ)
 - [@video@Java Tutorial for Beginners](https://www.youtube.com/watch?v=RRubcjpTkks)