Switch to M1 for grails-async

Author: jdaugherty

gradle.properties

@@ -12,7 +12,7 @@ jakartaElVersion=4.0.0
 jakartaElGlassfishImplVersion=4.0.2
 gradleNexusPluginVersion=2.3.1
 gradleNexusPublishPluginVersion=1.3.0
-grailsAsyncVersion=6.0.0-SNAPSHOT
+grailsAsyncVersion=6.0.0-M1
 grailsVersion=7.0.0-SNAPSHOT
 groovyVersion=4.0.24
 hibernateValidatorVersion=7.0.5.Final