Fix the no attribute 'all_tied_weights_keys' issue in transformers==5.0.0.

birefnet.py

@@ -2036,6 +2036,8 @@ class BiRefNet(
                 if 'bb.' in key and 'refiner.' not in key:
                     value.requires_grad = False
 
+        self.post_init()
+
     def forward_enc(self, x):
         if self.config.bb in ['vgg16', 'vgg16bn', 'resnet50']:
             x1 = self.bb.conv1(x); x2 = self.bb.conv2(x1); x3 = self.bb.conv3(x2); x4 = self.bb.conv4(x3)