Improved Keploy introduction in README.md

[Teesha-debnath]

Updated the introductory line to clearly explain Keploy's purpose and value proposition by emphasizing automation, traffic capture, and open-source nature.

[github-actions]

Thank you and congratulations 🎉 for opening your very first pull request in keploy

[pratik-mahalle]

Hey @Teesha-debnath, Thanks for raising this pr.
Unfortunately, this PR doesn’t include any meaningful changes, typos and breaking links are supposed or just content changes are to be reported not fixed. You can do so on the specific two repositories that we provided. In the future, please ensure that a PR in this repo is raised only if you’ve made substantial updates or solved a particular issue. This helps keep the process efficient and organized.
This being a part of an assignment in api fellowship would be counted since you were supposed to create a pr but wont be merged since this is not that relevant of a change. I’m sure you understand, and I appreciate your cooperation on this. We will be closing this PR for now.

[amaan-bhati]

Hey @Teesha-debnath Thanks for raising this PR, we appreciate the time and energy you've put into this but unfortunately PRs with minor/minimal changes is not what we are looking for at this point.