Update test model in registry

Signed-off-by: Shane A <shanea@allenai.org>

Author: 2015aroras

tests/models/registry.py

@@ -250,7 +250,7 @@ def check_available_online(
     "Fairseq2LlamaForCausalLM": _HfExamplesInfo("mgleize/fairseq2-dummy-Llama-3.2-1B"),
     "FalconForCausalLM": _HfExamplesInfo("tiiuae/falcon-7b"),
     "FalconH1ForCausalLM": _HfExamplesInfo("tiiuae/Falcon-H1-0.5B-Base"),
-    "FlexOlmoForCausalLM": _HfExamplesInfo("shanearora/Flex-reddit-2x7B-1T"),
+    "FlexOlmoForCausalLM": _HfExamplesInfo("allenai/Flex-reddit-2x7B-1T"),
     "GemmaForCausalLM": _HfExamplesInfo("google/gemma-1.1-2b-it"),
     "Gemma2ForCausalLM": _HfExamplesInfo("google/gemma-2-9b"),
     "Gemma3ForCausalLM": _HfExamplesInfo("google/gemma-3-1b-it"),