Update G-Analytics ID

This change is required, because the property was moved from
skipgu.gihub.io to skipgu.org. The old ID was not working anymore.

_config.yml

@@ -8,7 +8,7 @@ email: skip@gota.gu.se
 instagram_username: "skip.gu"
 linkedin_username: "company/skip-student-association"
 discord_link: "https://tinyurl.com/skip-discord"
-google_analytics: G-96M5M9TCM7 
+google_analytics: G-59HKXYXZ3V
 
 paginate: 10
 paginate_path: /page:num/