Update dependency com.palmergames.bukkit.towny:towny to v0.100.3.9 (#2846)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ mapmanager = "1.8.0-SNAPSHOT"
 griefprevention = "17.0.0"
 griefdefender = "2.1.0-SNAPSHOT"
 residence = "4.5._13.1"
-towny = "0.100.3.7"
+towny = "0.100.3.9"
 plotsquared = "7.3.8"
 
 # Third party