docs(attribution): clarify adsbdb data-use wording

src/data/dataCredits.js

@@ -47,7 +47,8 @@ export const DATA_CREDITS = [
     html:
       'Aircraft type, registration & flight routes: ' +
       '<a href="https://www.adsbdb.com" target="_blank" rel="noopener">adsbdb</a> ' +
-      '· aircraft data from PlaneBase · route data is the work of ' +
+      '· aircraft data from PlaneBase · ICAO-to-N-number conversion by ' +
+      'Guillaume Michel · route data is the work of ' +
       'David Taylor, Edinburgh, and Jim Mason, Glasgow, and may not be ' +
       'copied, published, or incorporated into other databases without the ' +
       'explicit permission of David J Taylor, Edinburgh',