Update rhino dep (you should still not be using this transitively)

Author: MaxNeedsSnacks

gradle.properties

@@ -16,7 +16,7 @@ mod_version=2101.7.2
 neoforge_version=21.1.199
 neoForge.parchment.minecraftVersion=1.21.1
 neoForge.parchment.mappingsVersion=2024.11.17
-rhino_version=2101.2.7-build.77
+rhino_version=2101.2.7-build.81
 tiny_server_version=1.0.0-build.33
 gif_lib_version=1.7