fix(stable-baselines3): repair broken API reference links (#233)

The "API Reference" bullets in references/callbacks.md and
references/vectorized_envs.md pointed at
`/en/master/common/callbacks.html` and `/en/master/common/vec_env.html`,
which both return 404. Upstream Stable-Baselines3 documents the
`stable_baselines3.common.callbacks` and `stable_baselines3.common.vec_env`
modules on the same pages as their narrative guides, not under `common/`.

Repoint both links at the module anchors on the guide pages:

- guide/callbacks.html#module-stable_baselines3.common.callbacks
- guide/vec_envs.html#module-stable_baselines3.common.vec_env

Both targets and both anchors were verified against the live docs and the
upstream genindex. The "Official ... Guide" bullet directly above each one
already used the correct `guide/` path, so the two `common/` URLs were
inconsistent within their own files.

Bump metadata.version to "1.2".

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

skills/stable-baselines3/SKILL.md

@@ -5,7 +5,7 @@ license: MIT license
 allowed-tools: Read Write Edit Bash
 compatibility: Requires Python 3.10+, PyTorch >= 2.3, and stable-baselines3 2.8+. Gymnasium environments; optional extras for TensorBoard and Atari (ale-py).
 metadata:
-  version: "1.1"
+  version: "1.2"
   skill-author: K-Dense Inc.
 ---
 

skills/stable-baselines3/references/callbacks.md

@@ -567,5 +567,5 @@ class DebugCallback(BaseCallback):
 ## Additional Resources
 
 - Official SB3 Callbacks Guide: https://stable-baselines3.readthedocs.io/en/master/guide/callbacks.html
-- Callback API Reference: https://stable-baselines3.readthedocs.io/en/master/common/callbacks.html
+- Callback API Reference: https://stable-baselines3.readthedocs.io/en/master/guide/callbacks.html#module-stable_baselines3.common.callbacks
 - TensorBoard Documentation: https://www.tensorflow.org/tensorboard

skills/stable-baselines3/references/vectorized_envs.md

@@ -576,5 +576,5 @@ model = PPO.load("model", env=eval_env)
 ## Additional Resources
 
 - Official SB3 VecEnv Guide: https://stable-baselines3.readthedocs.io/en/master/guide/vec_envs.html
-- VecEnv API Reference: https://stable-baselines3.readthedocs.io/en/master/common/vec_env.html
+- VecEnv API Reference: https://stable-baselines3.readthedocs.io/en/master/guide/vec_envs.html#module-stable_baselines3.common.vec_env
 - Multiprocessing Best Practices: https://docs.python.org/3/library/multiprocessing.html