Release 2.0.0-M1] Update version (take 2)

Updates the PR made by the 2.0.0-M1 release kick-off from
prepare-release.yml that got the `version.samples` incorrect.

Signed-off-by: Chris Bono <[email protected]>

Author: onobc

gradle.properties

@@ -1,5 +1,5 @@
 version=2.0.0-M1
-version.samples=1.2.8-SNAPSHOT
+version.samples=2.0.0-SNAPSHOT
 
 org.gradle.caching=true
 org.gradle.parallel=true