Update submissions.json

I updated my model name. Turns out the link doesn't open if the username is appended. Sorry any inconveniences this may cause.

submissions.json

@@ -100,7 +100,7 @@
         },
         {
             "username": "lukmanaj",
-            "model_name": "lukmanaj/smollm3-sft-colab-merged",
+            "model_name": "smollm3-sft-colab-merged",
             "chapter": "1",
             "submission_date": "2025-10-06",
             "results-dataset": "lukmanaj/details_lukmanaj__smollm3-sft-colab-merged_private"