docs: Resolve many typos in the English docs (#20088)

* docs: Fix typo in ONNX parser help: 'tolerence' => 'tolerance'

* docs: Resolve many typos in the English docs

Typos found via 'codespell ./docs/source/en'

docs/source/it/serialization.mdx

@@ -112,7 +112,7 @@ optional arguments:
   --feature {causal-lm, ...}
                         The type of features to export the model with.
   --opset OPSET         ONNX opset version to export the model with.
-  --atol ATOL           Absolute difference tolerence when validating the model.
+  --atol ATOL           Absolute difference tolerance when validating the model.
 ```
 
 L'esportazione di un checkpoint utilizzando una configurazione già pronta può essere eseguita come segue: