Fix 404 page (#575)

Author: penelopeysm

404.qmd

@@ -4,4 +4,6 @@ title: Page Not Found
 
 The page you requested cannot be found (perhaps it was moved or renamed).
 
-You may want to visit [Get-Started Guide]({{< meta get-started >}}) or [Tutorials]({{< meta tutorials-intro >}}).
+You may want to return to the [documentation home page](https://turinglang.org/docs).
+
+If you believe this is an error, please do report it by [opening an issue](https://github.com/TuringLang/docs/issues/new).

_quarto.yml

@@ -9,8 +9,7 @@ project:
 # These cannot be used as variables. They are reserved for the project configuration.
 website:
   title: "Turing.jl"
-  site-url: https://turinglang.org/
-  site-path: "/"
+  site-url: "https://turinglang.org/docs/"
   favicon: "assets/favicon.ico"
   search:
     location: navbar