Fix SLF4J warnings outputted by Gradle task

[lppedd]

Every time we run AntlrKotlinTask, we get the following console output:

SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
SLF4J: Class path contains SLF4J bindings targeting slf4j-api versions prior to 1.8.
SLF4J: Ignoring binding found at [jar:file:/C:/Users/edoardo.luppi/.gradle/caches/modules-2/files-2.1/org.slf4j/slf4j-simple/1.8.0-alpha2/932bb75081588f5eb466a330753e9ea96a552eaa/slf4j-simple-1.8.0-alpha2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Ignoring binding found at [jar:file:/C:/Users/edoardo.luppi/.gradle/wrapper/dists/gradle-8.3-all/6en3ugtfdg5xnpx44z4qbwgas/gradle-8.3/lib/gradle-logging-8.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#ignoredBindings for an explanation.