Backfill shared assets the sync path does not carry (#203)

The translation sync workflow watches lectures/**/*.md and lectures/_toc.yml,
so shared assets referenced *by* lectures never cross from the English source.
This edition's bibliography had drifted 70 entries behind upstream, and the
gap only surfaces when a newly-synced lecture happens to cite a missing key.

PR #202 (the Phillips Curve series) cites 57 keys that were absent here, and
lectures/phillips_drifts_volatilities.md loads a data file that raises
FileNotFoundError by design when it cannot be found — which then cascades into
an undefined-label warning for the figure that cell would have produced.

Backfills all 70 missing upstream entries rather than only the 57 this PR
needs, so the next sync that adds a citation does not fail the same way, and
adds the missing NEWQDATA.csv asset. Additive only: the three target-only keys
cited by robust_permanent_income.md and theil_2.md are preserved.

Refs QuantEcon/action-translation#117

Author: mmcky

lectures/_static/lecture_specific/phillips_drifts_volatilities/NEWQDATA.csv

@@ -0,0 +1,212 @@
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