[Doc] Fix hook naming (use 'beforeSave')

[afilp]

No description provided.

[afilp]

Please note that I found this code in the docs, this is why I proposed the PR. But I do not see it in the actual code now, so maybe the other doc is wrong?

{
        resource: "comments",
        beforeRead: async (data, dataProvider) => { /* ... */ },
        afterCreate: async (result, dataProvider) => { /* ... */ },
    },

[afilp]

ok, I added a new commit with the other change instead.

[fzaninotto]

Thanks!