Fix README.md (#116)
Fix README.md (#116)

From looking at https://plugins.gradle.org, jaci.openrio.gradle.GradleRIO is frozen at 2018.03.06, while edu.wpi.first.GradleRIO has the new version. Fixing README to make experimentation during the offseason less confusing
Open-RIO/GradleRIO,Open-RIO/GradleRIO,Open-RIO/GradleRIO,Open-RIO/GradleRIO