Update past editions

Author: th-rst-n

data/past-editions.json

@@ -4,20 +4,23 @@
         "image": "images/past/2025.jpg",
         "venue": "University of Copenhagen",
         "location": "Copenhagen, Denmark",
-        "date": "April 9–11"
+        "date": "April 9–11",
+        "url" : "https://satml.org/2025"
     },
     {
         "year": 2024,
         "image": "images/past/2024.jpg",
         "venue": "University of Toronto",
         "location": "Toronto, Canada",
-        "date": "April 9–11"
+        "date": "April 9–11",
+        "url" : "https://satml.org/2024"
     },
     {
         "year": 2023,
         "image": "images/past/2023.jpg",
         "venue": "Hilton Raleigh North Hills",
         "location": "Raleigh, United States",
-        "date": "February 8–10"
+        "date": "February 8–10",
+        "url" : "https://satml.org/2023"
     }
 ]