Update README.md

[KPCOFGS]

What does this PR do?

Fixed the link which can now redirect users to the LICENSE file when cliking on the license badge

Fixes # (issue)

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Mandatory Tasks

• [x] Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

Checklist

[vercel[bot]]

@KPCOFGS is attempting to deploy a commit to the langfuse Team on Vercel.

A member of the Team first needs to authorize it.

[CLAassistant]

All committers have signed the CLA.

[marcklingen]

thanks