chore: fix docs.yml navbar (#73)

Author: Ryan-Amirthan

fern/docs.yml

@@ -39,6 +39,16 @@ navigation:
   - tab: API Reference
     layout:
       - api: API Reference
+
+navbar-links:
+  - type: minimal
+    text: Fork this repo
+    url: https://github.com/fern-api/docs-starter
+  - type: filled
+    text: Get a demo
+    url: https://buildwithfern.com/contact?utm_campaign=demo&utm_medium=plantstore&utm_source=navbar
+  - type: github
+    value: https://github.com/fern-api/fern
 
 colors:
   accentPrimary: