Build failure: unable to download dataset

[ronaldtse]

From run https://github.com/interscript/geonames-transliteration-data/actions/runs/1168578292

It seems that either the page has changed or the dataset is available from another path.

We need to fix this.

[ronaldtse]

Same issue as #9 .

$ curl -sSL https://geonames.nga.mil/gns/html/namefiles.html | sed -n 's/.*geonames_\([0-9]*\)\.zip.*/\1/p'
20210809
$ curl -sSL https://geonames.nga.mil/gns/html/namefiles.html | sed -n 's/.*geonames_\([0-9]*\)\.zip.*/\1/p'
20210823

The problem is when the command times out, we need to abort.

[ronaldtse]

I've added the -f flag so that curl aborts when a failure is seen. It seems that the server is often returning 502, in addition to the altercating response of dates.