Neo.CLI: enable hardforks for NeoFS mainnet (neo-project#3240)

Otherwise this configuration file is broken. Port changes from
nspcc-dev/neo-go#3446.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

src/Neo.CLI/config.fs.mainnet.json

@@ -36,6 +36,11 @@
     "MaxTraceableBlocks": 2102400,
     "InitialGasDistribution": 5200000000000000,
     "ValidatorsCount": 7,
+    "Hardforks": {
+      "HF_Aspidochelone": 3000000,
+      "HF_Basilisk": 4500000,
+      "HF_Cockatrice": 5800000
+    },
     "StandbyCommittee": [
       "026fa34ec057d74c2fdf1a18e336d0bd597ea401a0b2ad57340d5c220d09f44086",
       "039a9db2a30942b1843db673aeb0d4fd6433f74cec1d879de6343cb9fcf7628fa4",