Update urls in warnings for rich rendering (#24136)

* fixing typo in url in warnings

* fixing typo in url in warnings

* multi-line fix

* multi-line fix

* Update src/transformers/generation/utils.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update src/transformers/generation/flax_utils.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update src/transformers/generation/tf_utils.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

---------
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

src/transformers/generation/flax_utils.py

@@ -319,7 +319,7 @@ class FlaxGenerationMixin:
                         "You have modified the pretrained model configuration to control generation. This is a"
                         " deprecated strategy to control generation and will be removed soon, in a future version."
                         " Please use a generation configuration file (see"
-                        " https://huggingface.co/docs/transformers/main_classes/text_generation)"
+                        " https://huggingface.co/docs/transformers/main_classes/text_generation )"
                     )
                     self.generation_config = new_generation_config
             generation_config = self.generation_config

src/transformers/generation/tf_utils.py

@@ -746,7 +746,7 @@ class TFGenerationMixin:
                         "You have modified the pretrained model configuration to control generation. This is a"
                         " deprecated strategy to control generation and will be removed soon, in a future version."
                         " Please use a generation configuration file (see"
-                        " https://huggingface.co/docs/transformers/main_classes/text_generation)"
+                        " https://huggingface.co/docs/transformers/main_classes/text_generation )"
                     )
                     self.generation_config = new_generation_config
             generation_config = self.generation_config

src/transformers/generation/utils.py

@@ -1260,7 +1260,7 @@ class GenerationMixin:
                         "You have modified the pretrained model configuration to control generation. This is a"
                         " deprecated strategy to control generation and will be removed soon, in a future version."
                         " Please use a generation configuration file (see"
-                        " https://huggingface.co/docs/transformers/main_classes/text_generation)"
+                        " https://huggingface.co/docs/transformers/main_classes/text_generation )"
                     )
                     self.generation_config = new_generation_config
             generation_config = self.generation_config