Fix links for `contrastive_loss` (#20455)

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

src/transformers/models/clipseg/modeling_clipseg.py

@@ -63,7 +63,7 @@ def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int]
 
 
 # contrastive loss function, adapted from
-# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/CLIPSeg.html
+# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/CLIP.html
 def contrastive_loss(logits: torch.Tensor) -> torch.Tensor:
     return nn.functional.cross_entropy(logits, torch.arange(len(logits), device=logits.device))
 

src/transformers/models/groupvit/modeling_groupvit.py

@@ -64,7 +64,7 @@ def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int]
 
 
 # contrastive loss function, adapted from
-# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/GroupViT.html
+# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/CLIP.html
 def contrastive_loss(logits: torch.Tensor) -> torch.Tensor:
     return nn.functional.cross_entropy(logits, torch.arange(len(logits), device=logits.device))
 

src/transformers/models/x_clip/modeling_x_clip.py

@@ -62,7 +62,7 @@ def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int]
 
 
 # contrastive loss function, adapted from
-# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/clip.html
+# https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/CLIP.html
 def contrastive_loss(logits: torch.Tensor) -> torch.Tensor:
     return nn.functional.cross_entropy(logits, torch.arange(len(logits), device=logits.device))