screenshots and URL links updated

Author: pramit-marattha

README.md

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+# 21) Road Trip Map (MERN stack).
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+| Road Trip Map |
+|:---------------:|
+| <img src="https://user-images.githubusercontent.com/37651620/102373927-d301b880-3fe8-11eb-85b7-2628268a0ccd.png" width="900"/> |
+| It's Live 🎉 Visit here ==> https://road-trip-map.netlify.app/ |
+
+<br/>
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