Update contact.yml

Author: meroxdotdev

_data/contact.yml

@@ -3,8 +3,9 @@
 - type: github
   icon: "fab fa-github"
 
-- type: twitter
-  icon: "fa-brands fa-x-twitter"
+- type: linkedin
+  icon: "fab fa-linkedin"
+  url: 'https://www.linkedin.com/in/robert-melcher-92a1a9157?utm_source=share&utm_campaign=share_via&utm_content=profile&utm_medium=ios_app'
 
 - type: email
   icon: "fas fa-envelope"