Added InsertionSort.java & also modified README.md

[nunia]

Description

Related Issue

This PR closes #

Motivation and Context

Screenshots (if any)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.

[SVijayB]

Already added the calculator program and there seems to be a conflict in the README.md file. Closing the pull request.

[nunia]

Can I add an Insertion sort Program in Searching & Sorting Algorithm?

[SVijayB]

@Nunia yes you can! Feel free to.