Update README.md

Author: intel00000

README.md

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 # AD5761_Micropython - AD5761 DAC Control on MicroPython
 
 This project provides a full implementation for controlling the **AD5761** Digital-to-Analog Converter on **MicroPython**. All testing is done on a **Raspberry Pi Pico** with RP2040. You might want to add timing interval between sync pulses and read/write operations if you encounter random bit in return values.
-Datasheet Reference: [AD5761 Datasheet](./ad5761_5721.pdf)
+Datasheet Reference: [Datasheet](./ad5761_5721.pdf)
 
 ## Features