bug: resource servers table in README missing description and value

[cwing-nvidia]

Describe the bug

calendar, code gen, math with judge missing. all new environments added in 0.2.0 also need to be checked to ensure values are defined

Steps/Code to reproduce bug

Please list minimal steps or code snippet for us to be able to reproduce the bug.

A helpful guide on on how to craft a minimal bug report http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports.

Expected behavior

A clear and concise description of what you expected to happen.

Configs
NeMo Gym (e.g. via ng_dump_config) or RL training framework config files.

Environment details

Otherwise, please provide:

• OS version
• Python version
• uv pip list output

Additional context

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Example: GPU model