docs: update license section in README

[BraianS]

Description

Update license section in Readme

Additional context

Simplify the license description by reducing it to a single line

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What is the purpose of this pull request?

• Bug fix
• New Feature
• [ x ] Documentation update
• Other

Before submitting the PR, please make sure you do the following

• [ x ] Read the Contributing Guidelines.
• [ x ] Follow the Style Guide.
• [ x ] Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• [ x ] Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).

[tianenpang]

Hi @BraianS Thanks for your contribution! Please resolve the conflicts.