Gospel x Internet credits Glottolog on the board

The language tree's source (Glottolog 5.2.1, CC BY 4.0) joins the board's
standing sources line and the CSV provenance, read from the snapshot's own
citation.

plugin-designs/gospel-internet/scripts/build-gospel-internet.mjs

@@ -58,6 +58,8 @@ const ibc = T('internet-by-country.json')
 const adm1 = T('internet-by-adm1.json')
 const byProvince = T('gospel-by-province.json')
 const byGroup = T('gospel-by-province-groups.json')
+// The language tree's source, credited on the board like every other (CC BY 4.0 requires it)
+const glotto = JSON.parse(readFileSync(resolve(REPO, 'data/glottolog/glottolog-subset.json'), 'utf8'))
 const msg = T('messaging-channels.json')
 const social = T('social-platforms.json')
 
@@ -258,6 +260,7 @@ if (failures.length) {
         adm1.meta?.sources?.nfhs5?.attribution || '',
         'geoBoundaries (CC BY 2.5 IN for India)',
         msg.meta?.source?.name || '', social.meta?.source?.name || '',
+        glotto.source ? `${glotto.source.replace(/ as CLDF$/, '').replace(/^glottolog\/glottolog: /, '')} (CC BY 4.0), language tree` : '',
       ].filter(Boolean),
     },
     // One entry per country in the rows: the Platforms view reads it; rows carry only the top app.