replace platform -> title

Author: sabaimran

docs/_config.yml

@@ -11,10 +11,10 @@ url: "https://coup.khoj.dev"
 # Social media links (Minima will automatically add icons to header)
 minima:
   social_links:
-    - platform: Twitter
+    - title: Twitter
       icon: x-twitter
       url: "https://twitter.com/khoj_ai"
-    - platform: GitHub
+    - title: GitHub
       icon: github
       url: "https://github.com/khoj-ai/"