Update README.md

interrupts/README.md

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 You will find a couple of posts which describes an interrupts and an exceptions handling in the linux kernel.
 
 * [Interrupts and Interrupt Handling. Part 1.](https://github.com/0xAX/linux-insides/blob/master/interrupts/interrupts-1.md) - describes an interrupts handling theory.
-* [Start to dive into interrupts in the Linux kernel](https://github.com/0xAX/linux-insides/blob/master/interrupts/interrupts-2.md) - this part starts to describe interrupts and exceptions handling related stuff from the early stage. 
+* [Start to dive into interrupts in the Linux kernel](https://github.com/0xAX/linux-insides/blob/master/interrupts/interrupts-2.md) - this part starts to describe interrupts and exceptions handling related stuff from the early stage.
+* [Interrupt handlers](https://github.com/0xAX/linux-insides/blob/master/interrupts/interrupts-3.md) - third part describes early interrupt handlers.