Request to add a github action

[Jassi10000-zz]

This is a(n):

• New algorithm
• Update to an existing algorithm
• Error
• Proposal to the Repository

Details:

cosmos is an awesome and an engaging repository , plus due to hacktoberfest'21 many open source enthusiasts ( preferably students who are first time contributors ) open issues and PRs which eventually help repo to grow
I think there should be a github action to welcome contributors on their each issue and PR so as to make repository more interactive

[MrKrishnaAgarwal]

I want to work on this issue @Jassi10000 and @AdiChat

I can add a github action for welcoming people on this repo.