IWF-583 Bump release version to v2.9.0 (#292)

Co-authored-by: Nathan Givens <ngivens@indeed.com>

Author: N-give

build.gradle

@@ -161,7 +161,7 @@ signing {
 }
 
 group = "io.iworkflow"
-version = "2.8.1"
+version = "2.9.0"
 
 nexusPublishing {
     repositories {