[BUG] ransomware models need update for Triton 22.08

[bsuryadevara]

Describe the bug

Running the ransomware example against Triton 22.06 causes an error.

I0720 15:02:15.298079 2411715 model_initialize.hpp:37] TRITONBACKEND_ModelInitialize: ransomw-model-short-rf (version 1)
I0720 15:02:15.300327 2411715 instance_initialize.hpp:46] TRITONBACKEND_ModelInstanceInitialize: ransomw-model-short-rf_0 (GPU device 0)
terminate called after throwing an instance of 'std::runtime_error'
  what():  Cannot deserialize model from a different version of Treelite.
Currently running Treelite version 2.4.0
The model checkpoint was generated from Treelite version 2.3.0

Works against old version of Triton 22.06.

Steps/Code to reproduce bug
Run the ransomware example against Triton 22.08 based on the readme.

Expected behavior
Sample pipeline runs to completion.

Environment overview (please complete the following information)

• Environment location: [Bare-metal]
• Method of Morpheus install: [Docker/k8s]

Environment details
Please run and paste the output of the morpheus/scripts/print_env.sh script here, to gather any other relevant environment details

Additional context
Add any other context about the problem here.