[ANNOUNCE] Groovy 2.5.21 and 4.0.8 Windows installers released

[Keegan Witt]

2.5.21:
https://groovy.jfrog.io/ui/native/dist-release-local/groovy-windows-installer/groovy-2.5.21/groovy-2.5.21.msi

4.0.8:
https://groovy.jfrog.io/ui/native/dist-release-local/groovy-windows-installer/groovy-4.0.8/groovy-4.0.8.msi

-Keegan