Issue with checksum explanation

[dehem70]

Hello

On the file docs/learn/operation-format-execution.mdx, for the explanation of the checksum verification, the doc says :
- serialize the operation ID in binary format (see above)
- compute the SHA256 hash of the binary serialization
- append the first 4 bytes of the sha256 hash at the end of the binary serialization of the ID. This is used as a checksum to detect typing errors as operation IDs are also meant to be written on paper by humans.

In reality it is :
- compute the SHA256 hash of the SHA256 hash of the binary serialization

The serialization of the binary => A
Computing sha256(sha256(A)
the first 4 bytes of this result are appended at the end of the binary serialization (A).

This process is present many time on the document.

Thanks for the correction