Fix Funnel configuration doc (#15686)

* fix doc

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

src/transformers/models/funnel/configuration_funnel.py

@@ -77,8 +77,7 @@ class FunnelConfig(PretrainedConfig):
         type_vocab_size (`int`, *optional*, defaults to 3):
             The vocabulary size of the `token_type_ids` passed when calling [`FunnelModel`] or [`TFFunnelModel`].
         initializer_range (`float`, *optional*, defaults to 0.1):
-            The standard deviation of the *uniform initializer* for initializing all weight matrices in attention
-            layers.
+            The upper bound of the *uniform initializer* for initializing all weight matrices in attention layers.
         initializer_std (`float`, *optional*):
             The standard deviation of the *normal initializer* for initializing the embedding matrix and the weight of
             linear layers. Will default to 1 for the embedding matrix and the value given by Xavier initialization for