Update inheritance.md

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INHERITANCE IN JAVA

Inheritance in Java is a fundamental concept that allows a new class (subclass or child class) to inherit properties and behaviors from an existing class (superclass or parent class). This promotes code reuse and establishes an "is-a" relationship between classes. Subclasses can access the attributes and methods of their superclass, and they can also extend and override those inherited members. Inheritance helps create a hierarchy of classes, making code more organized and efficient. It's a key pillar of object-oriented programming, enabling the building of more specialized classes on top of more general ones, facilitating modularity and maintaining code consistency.