fix attention in qwen model

Author: lepoissonfroid

pyvene/models/qwen2/modelings_intervenable_qwen2.py

@@ -36,15 +36,15 @@
     "mlp_output": ("hidden_size",),
     "mlp_input": ("hidden_size",),
     "attention_value_output": ("hidden_size",),
-    "head_attention_value_output": ("head_dim",),
+    "head_attention_value_output": ("hidden_size/num_attention_heads",),
     "attention_output": ("hidden_size",),
     "attention_input": ("hidden_size",),
     "query_output": ("hidden_size",),
     "key_output": ("hidden_size",),
     "value_output": ("hidden_size",),
-    "head_query_output": ("head_dim",),
-    "head_key_output": ("head_dim",),
-    "head_value_output": ("head_dim",),
+    "head_query_output": ("hidden_size/num_attention_heads",),
+    "head_key_output": ("hidden_size/num_attention_heads",),
+    "head_value_output": ("hidden_size/num_attention_heads",),
 }
 
 """qwen2 model with LM head"""
@@ -74,4 +74,4 @@ def create_qwen2(
         torch_dtype=dtype,
     )
     print("loaded model")
-    return config, tokenizer, model
+    return config, tokenizer, model