Added a 'Cited by' section in README.md file.

[anirudhsai20]

Issue Number

ISSUE #

Describe the changes you've made

Describe if there is any unusual behaviour of your code(Write NA if there isn't)

Additional context (OPTIONAL)

Test plan (OPTIONAL)

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my own code.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• The title of my pull request is a short description of the requested changes.