Bump Adventure library

Please note that aspects of the new API are not implemented, especially
regarding the newly added signed messaging stuff, this is just to keep
in sync with other projects.

build.gradle

@@ -10,7 +10,7 @@ allprojects {
 
     ext {
         // dependency versions
-        adventureVersion = '4.11.0'
+        adventureVersion = '4.12.0'
         junitVersion = '5.9.0'
         slf4jVersion = '1.7.30'
         log4jVersion = '2.19.0'