feat(fern): add agents page-directive and bump fern version (#8071)

Signed-off-by: Ryan Amirthan Stephen <ryanstep@umich.edu>

fern/docs.yml

@@ -21,6 +21,10 @@ instances:
 
 title: NVIDIA Dynamo Documentation
 
+agents:
+  page-directive: "For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://docs.nvidia.com/dynamo/llms.txt. For full content including API reference and SDK examples, see https://docs.nvidia.com/dynamo/llms-full.txt."
+
+
 products:
   - display-name: Dynamo
     slug: /

fern/fern.config.json

 {
   "organization": "nvidia",
-  "version": "4.23.0"
+  "version": "4.66.1"
 }