Use HF papers (#38184)

* Use hf papers

* Hugging Face papers

* doi to hf papers

* style

src/transformers/modeling_utils.py

@@ -1881,7 +1881,7 @@ class ModuleUtilsMixin:
         Get number of (optionally, non-embeddings) floating-point operations for the forward and backward passes of a
         batch with this transformer model. Default approximation neglects the quadratic dependency on the number of
         tokens (valid if `12 * d_model << sequence_length`) as laid out in [this
-        paper](https://arxiv.org/pdf/2001.08361.pdf) section 2.1. Should be overridden for transformers with parameter
+        paper](https://huggingface.co/papers/2001.08361) section 2.1. Should be overridden for transformers with parameter
         re-use e.g. Albert or Universal Transformers, or if doing long-range modeling with very high sequence lengths.
 
         Args: