update the Groovy library to v5.0.6

Author: stephengold

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ jme = "3.10.0-alpha3"
 
 [libraries]
 
-groovy-jsr223 = "org.apache.groovy:groovy-jsr223:5.0.5"
+groovy-jsr223 = "org.apache.groovy:groovy-jsr223:5.0.6"
 heart = "com.github.stephengold:Heart:9.3.0"
 
 jme3-awt-dialogs = { module = "org.jmonkeyengine:jme3-awt-dialogs", version.ref = "jme" }