test: re-record the translation-prompt snapshot for the edited gold pairs

The runnable snapshot pins the assembled pipeline request, whose
few-shot turns are the current text of five reviewed gold pairs; this
PR edits two of them (docs/development.md and docs/i18n/README.md pairs)
so the recorded request goes stale, per the gold-pair contract in
docs/i18n/translation-prompt.md. DSH_SNAPSHOT=refresh re-record; the
diff is exactly the six affected few-shot message bodies.