treewide: change my no longer used email

treewide: change my no longer used email

Since February 2023, I decided to no longer work with Turris, I mean CZ.NIC company
due to some reasons how the development goes and since that day my work address is not
available and not sure if there is some redirect to someone else, but if anyone wants to
reach me, use my email address, where they can find me.

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>