Update crypto-details.tex with kes construction info

[perturbing]

Hi,

An auditor pointed out that it would be good to add the clarification of which signature scheme and hash function are used in the sum construction of the key evolution scheme (similar to how we do it for addresses).

As per, for example, this line, we use Ed25519 and the BLAKE2b-256.

And given IntersectMBO/ouroboros-network#2403 I also corrected the MaxKesEvo value to match mainnet

[thomas@nixos:~]$ curl https://book.world.dev.cardano.org/environments/mainnet/shelley-genesis.json | grep KES
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2486  100  2486    0     0  21255      0 --:--:-- --:--:-- --:--:-- 21431
  "slotsPerKESPeriod": 129600,
  "maxKESEvolutions": 62,

[carlostome]

Looks good to me!