added pactum under software testing

[ASaiAnudeep]

Please confirm this pull request meets the following requirements:

• [x] I followed the contributing guidelines: https://github.com/github/india/blob/main/CONTRIBUTING.md.

Which change are you proposing?

• [x] Adding/updating open source project/s
• [ ] Adding/updating maintainer/s

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Adding/updating open source project/s

• [x] The project was built in or receives significant contributions from India
• [x] The project has at least 100 stargazers

Why should this open source project be featured?

PactumJS is a REST API testing tool for all levels in a test pyramid that is mostly built by the Indian Community.