Revert "Temporarily reduce GESIS weight to federation"

Author: rgaiacs

config/prod.yaml

@@ -236,7 +236,7 @@ federationRedirect:
     hetzner-gesis:
       prime: false
       url: https://gesis.mybinder.org
-      weight: 0
+      weight: 50
       health: https://gesis.mybinder.org/health
       versions: https://gesis.mybinder.org/versions
     ovh2: