Add the changelog entry for the Wikidata cities pack

Co-authored-by: Manjunath Paparaju <[email protected]>

changelog.d/1743-wikidata-cities.md

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+- Bundle 31,827 cities from Wikidata (CC0) for offline place lookups: the
+  nearest city, the cities around a point and a city by name, matched without
+  accents (manjunath22466, samehkhamis, #1743).