Update `x509-plutus-restricted-c509` CDDL to draft 11

[bkioshn]

Once the draft11 is updated input-output-hk/catalyst-libs#22

Update the CDDL of c509 from draft 9 to draft 11
https://github.com/input-output-hk/catalyst-CIPs/tree/x509-plutus-restricted-c509