publish-2026aug19

Restore the repointed data URLs reverted by the #154 regeneration (#155)

The #154 sync was regenerated from its source PR's merge-time snapshot,
which predates the test_pwt repoint synced here in #153 — so it
reverted two polars.md reads to the source repo's old own-repo URL (a
path scheduled for deletion) and rewrote three pandas_panel.md reads
to the raw.githubusercontent host form. This restores all five reads
to the canonical data-lectures form the English source uses. URL-only;
no translated text changes. The underlying regeneration defect is
recorded in QuantEcon/action-translation#276.

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