fix: rebuild heading-maps with action-translation v0.12.5

Strips MyST inline roles ({index}, etc.) from heading-map keys/values.
Regenerated using: npx translate headingmap

Author: mmcky

.translate/state/python_advanced_features.md.yml

@@ -3,4 +3,4 @@ synced-at: "2026-03-25"
 model: claude-sonnet-4-6
 mode: UPDATE
 section-count: 7
-tool-version: 0.12.4
+tool-version: 0.12.5

lectures/python_advanced_features.md

@@ -8,7 +8,6 @@ kernelspec:
   language: python
   name: python3
 heading-map:
-  More Language Features: 更多语言特性
   Overview: 概述
   Iterables and iterators: 可迭代对象与迭代器
   Iterables and iterators::Iterators: 迭代器