chore(human.json): more vouches

Author: foosel

static/human.json

@@ -33,6 +33,10 @@
         {
             "url": "https://www.paulox.net",
             "vouched_at": "2026-03-16"
+        },
+        {
+            "url": "https://leah.is",
+            "vouched_at": "2026-03-20“
         }
     ]
 }