Add ransomware model to devcontainer

[yczhang-nv]

Description

Add the ransomw-model-short-rf model to the triton volumes section of .devcontainer/docker-compose.yaml Closes #1780

By Submitting this PR I confirm:

• I am familiar with the Contributing Guidelines.
• When the PR is ready for review, new or existing tests cover these changes.
• When the PR is ready for review, the documentation is up to date with these changes.

[dagardner-nv]

/merge