fix: lora-bias-backup don't reset cache

Author: dongwenpu

extensions-builtin/Lora/networks.py

@@ -418,6 +418,7 @@ def network_forward(module, input, original_forward):
 def network_reset_cached_weight(self: Union[torch.nn.Conv2d, torch.nn.Linear]):
     self.network_current_names = ()
     self.network_weights_backup = None
+    self.network_bias_backup = None
 
 
 def network_Linear_forward(self, input):