chore(deps): update dependency docfx to v2.73.1

Author: renovate[bot]

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "docfx": {
-      "version": "2.73.0",
+      "version": "2.73.1",
       "commands": ["docfx"]
     }
   }