added 7 motivational quotes

[keshari777]

Check one of the below boxes as per your PR

• [:heavy_check_mark: ] Adding more quotes issue
• [ ✔️ ] Fixes another issue HACKTOBERFEST 2020 #16 (<=== Add issue number here)

Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!

• [ ✔️ ] PR is descriptively titled 📑 and links the original issue above 🔗
• [ ✔️ ] code is in uniquely-named branch and has no merge conflicts 📁
• [: ] screenshots/GIFs are attached 📎 if applicable
• ask @avats-dev for help, in a comment below

I'm happy to help you get this ready -- don't be afraid to ask for help, and don't be discouraged !

Thanks!

[welcome]

Thanks for opening this pull request!
There may be some errors, but don't worry! We'll work through them with you! 👍🎉😄

[avats-dev]

@keshari777, Update with requested changes. Thanks 👍

[welcome]

Congrats on merging your first pull request! 🙌🎉⚡️

Now that you've completed this, you can help someone else take their first step!

Help others take their first step

Now that you've merged your first pull request, you're the perfect person to help someone else out with this challenging first step. 🙌

Try looking at this list of [add more quotes](https://github.com//issues/1) issue, and see if someone else is waiting for feedback, or even stuck! 😕

People often get stuck at the same steps, so you might be able to help someone get unstuck, or help lead them to some documentation that'd help. Reach out and be encouraging and friendly! 😄 🎉