Fix global docfx.json

Author: JasonWHowell

docfx.json

@@ -1252,7 +1252,7 @@
         "articles/defender-for-iot/organizations/*.md": "defender-for-iot",
         "articles/defender-for-iot/organizations/**/*.md": "defender-for-iot",
         "articles/defender-for-iot/device-builders/*.md": "defender-for-iot",
-        "articles/event-grid/**/*.md": "event-grid",
+        "articles/event-grid/**/*": "azure-event-grid",
         "articles/event-hubs/*.md": "event-hubs",
         "articles/governance/*.md": "governance",
         "articles/governance/blueprints/**/*.md": "blueprints",