fix: solid form save event not sent on error
I think there is an error on documentation for the save event for the form componenent.
In case of validation error on the backend, the event is not sent (cf https://git.startinblox.com/framework/sib-core/-/blob/master/src/components/solid-form.ts#L115).
I changed the documentation to remove this case.
I dont know who is in charge of this so i ping you both @balessan @manonbou