site/content: regenerate terms

This is based on the new cluster/module re-organization by Peter
last week: idss_schema_fields_new2.xlsx

site/content/terms/global-date-changed/index.md

@@ -0,0 +1,11 @@
+---
+title: 'date changed'
+field: 'dcterms.modified'
+slug: 'global-date-changed'
+description: 'Date when the resource was changed.'
+comment: 'yyyy-mm-dd'
+required: False
+module: 'Status'
+cluster: 'Global'
+policy: 'Date. Single value only.'
+---