fix image url for open graph (#125)

Author: shravanngoswamii

_quarto.yml

@@ -10,11 +10,13 @@ website:
   title: "Turing.jl"
   site-url: https://turinglang.org
   description: "Turing.jl is a probabilistic programming language and Bayesian modelling framework for the Julia programming language."
-  image: assets/logo/turing-text-logo.jpg
-  favicon: "assets/favicon.ico"
+  image: /assets/logo/turing-text-logo.jpg
+  favicon: /assets/favicon.ico
   open-graph:
     title: "The Turing Language"
     locale: en_GB
+    image: /assets/logo/turing-text-logo.jpg
+    image-alt: "Turing.jl Logo"
   twitter-card:
     creator: "@Hong_Ge2"
     site: "@TuringLang"
@@ -24,7 +26,7 @@ website:
     location: navbar
     type: overlay
   navbar:
-    logo: "assets/logo/turing-logo.svg"
+    logo: /assets/logo/turing-logo.svg
     # logo-href: https://turinglang.org/ -- Keep this commented so clicking on logo in dev mode doesn't redirect to the site
     left:
       - text: Get Started