fix fusion alpha to 0.7

config.json

@@ -1 +1 @@
-{"embed_dim": 768, "use_cross_attn": true, "use_segmentation": true, "num_heads": 12, "in_chans": 1, "num_classes": 2, "cross_num_heads": 8, "fusion_alpha": 1.0, "depth": 12}
+{"embed_dim": 768, "use_cross_attn": true, "use_segmentation": true, "num_heads": 12, "in_chans": 1, "num_classes": 2, "cross_num_heads": 8, "fusion_alpha": 0.7, "depth": 12}