fix: move changelog to /changelog (#57)

Co-authored-by: Andrew Jiang <[email protected]>

Author: fern-support

fern/changelog/overview.mdx

@@ -0,0 +1,3 @@
+---
+slug: changelog
+---

fern/docs.yml

@@ -53,7 +53,7 @@ navbar-links:
     href: https://status.vapi.ai/
   - type: minimal
     text: Changelog
-    href: /documentation/general/changelog
+    href: /changelog
   - type: minimal
     text: Support
     href: /support
@@ -380,6 +380,8 @@ navigation:
             href: https://api.vapi.ai/api-json
 
 redirects:
+  - source: /documentation/general/changelog
+    destination: /changelog
   - source: /api-reference/assistants/create-assistant
     destination: /api-reference/assistants/create
   - source: /api-reference/assistants/get-assistant