docs: fix url to roadmap

Author: sandydoo

docs/.pages

@@ -33,7 +33,7 @@ nav:
     - Integrations: integrations
     - Examples: examples.md
     - Editor Support: editor-support
-  - Roadmap: blog/posts/2024/10/22/devenv-is-switching-nix-implementation-to-tvix
+  - Roadmap: /blog/2024/10/22/devenv-is-switching-its-nix-implementation-to-tvix
   - Reference: reference
   - Blog: blog
   - Community: community