Fix small typo in flan-ul2.mdx (#22068)

* Update flan-ul2.mdx

* Update flan-ul2.mdx

docs/source/en/model_doc/flan-ul2.mdx

@@ -31,7 +31,7 @@ One can refer to [T5's documentation page](t5) for all tips, code examples and n
 The original checkpoints can be found [here](https://github.com/google-research/t5x/blob/main/docs/models.md#flan-ul2-checkpoints).
 
 
-## Running on low ressources devices
+## Running on low resource devices
 
 The model is pretty heavy (~40GB in half precision) so if you just want to run the model, make sure you load your model in 8bit, and use `device_map="auto"` to make sure  you don't have any OOM issue!
 
@@ -49,4 +49,4 @@ The model is pretty heavy (~40GB in half precision) so if you just want to run t
 
 ## Inference
 
-The inference protocol is exaclty the same as any `T5` model, please have a look at the [T5's documentation page](t5) for more details.
\ No newline at end of file
+The inference protocol is exaclty the same as any `T5` model, please have a look at the [T5's documentation page](t5) for more details.