Update LICENSE.md

## KissMCMC v0.2.1

[Diff since v0.2.0](v0.2.0...v0.2.1)


**Closed issues:**
- Crash with BigFloats (#10)

**Merged pull requests:**
- Install TagBot as a GitHub Action (#9) (@JuliaTagBot)
- Using GitHub actions for CI, ditched Cirrus and Travis (#11) (@mauro3)
- CompatHelper: bump compat for "StaticArrays" to "1.0" (#12) (@github-actions[bot])

See github.com/mauro3/KissMCMC.jl/releases/tag/v0.2.0 for release notes

Reinstated Rhat