Add missing readme_renderer dependency to twine

[maresb]

Twine depends on readme_renderer depends on cmarkgfm. Cmarkgfm is compiled and doesn't exist for Python 3.13. I encountered an inconsistent solved environment with Python 3.13 and twine 1.13.0_0 because this build was missing those dependencies.

As an upcoming solution, I updated the stale cmarkgfm feedstock in conda-forge/cmarkgfm-feedstock#33, and I triggered a pending bot-rerun for the Python 3.13 rebuild in conda-forge/cmarkgfm-feedstock#32.

This patch is a retroactive solution.

Checklist

• Used a static YAML file for the patch if possible (instructions).
• Only wrote code directly into generate_patch_json.py if absolutely necessary.
• Ran pre-commit run -a and ensured all files pass the linting checks.
• Ran python show_diff.py and posted the output as part of the PR.
• Modifications won't affect packages built in the future.

noarch
noarch::twine-1.13.0-py_0.tar.bz2
+    "readme_renderer >=21.0",

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[xhochy]

cc @conda-forge/twine

[bollwyvl]

LGTM