updated the footer link with an explanation git link

Author: ProgrammingHero1

README.md

@@ -219,4 +219,4 @@ __________________
 4. Graph and high order data structure in JavaScript
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-Inpsired by, [darcyclarke](https://github.com/darcyclarke/Front-end-Developer-Interview-Questions), [css-tricks](http://css-tricks.com/interview-questions-css/), [david shariff](http://davidshariff.com/quiz/) and some google results. If you want to add any question to this let me know.
+Inpsired by, [darcyclarke](https://github.com/darcyclarke/Front-end-Developer-Interview-Questions), [css-tricks](http://css-tricks.com/interview-questions-css/), [david shariff](https://gist.github.com/jesspoemape/87665d65cde3980485ec27cef1602a0d) and some google results. If you want to add any question to this let me know.