🌐 [translation-sync] Small edits to Numba lecture

Syncs translation of lectures/numba.md with upstream source PR #526.

Changes include:
- Restructure sections: 'Dangers and Limitations' → 'Sharp Bits'
- Add 'Base Version' and 'Acceleration via Numba' subsections
- Make α a default parameter instead of global variable
- Rename h() to update(), add English code comments
- Add warm-up + second run timing cells
- Move Julia comparison into {note} admonition
- Simplify overview text
- Various wording improvements

Source: QuantEcon/lecture-python-programming#526

Author: mmcky

.translate/state/numba.md.yml

@@ -1,6 +1,6 @@
-source-sha: a897eb875ecbf8975872fd6bc0a6b2e91a6ba701
+source-sha: be6eeaee8db0c8bfea65b89d57ca8aecf7f96dff
 synced-at: "2026-04-12"
 model: claude-sonnet-4-6
 mode: UPDATE
-section-count: 6
+section-count: 5
 tool-version: 0.14.1