Update README.md

Author: simran2104

Dictionary/README.md

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 <p>
 This is the simple dictionary made in Python using libraries: "json" and "difflib". In this, user is asked with a word of which he wants to know the meaning of. And then using "data.json" file, he will be get to know its meaning.
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+<p align="center">
+<img src="https://github.com/simran2104/Python-Projects/blob/main/Dictionary/demo.gif" >
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