Update dependency com.matyrobbrt:JDA-Chewtils to v2

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ launch4j = { id = 'edu.sc.seis.launch4j', version = '2.5.3' }
 jda = "5.0.0-beta.4"
 # https://github.com/Matyrobbrt/JDA-Chewtils/commit/c2bfe64e447817aa5ddac0dab0f12bcede0fe37d
 # chewtils = "2.0-SNAPSHOT"
-chewtils = "c2bfe64"
+chewtils = "2.1"
 guava = "31.1-jre"
 gson = "2.10"
 logback = "1.2.11"