add license-badge

[harrythehat1975]

Added license-badge to this repo

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions.

Description of the Change

Why Should This Be In The Package?

Benefits

Possible Drawbacks

Verification Process

Applicable Issues (Optional)

[harrythehat1975]

[mdb]

Thanks @harrythehat1975 !