docs: add description about hexEncode and hexDecode

Signed-off-by: Tural Devrishev <tural@nspcc.ru>

Author: Tural Devrishev

docs/node-configuration.md

@@ -582,7 +582,7 @@ in development and can change in an incompatible way.
 | `Cockatrice`    | Introduces the ability to update native contracts. Includes a couple of new native smart contract APIs: `keccak256` of native CryptoLib contract and `getCommitteeAddress` of native NeoToken contract. | https://github.com/nspcc-dev/neo-go/pull/3402 <br> https://github.com/neo-project/neo/pull/2942 <br> https://github.com/nspcc-dev/neo-go/pull/3301 <br> https://github.com/neo-project/neo/pull/2925 <br> https://github.com/nspcc-dev/neo-go/pull/3362 <br> https://github.com/neo-project/neo/pull/3154 |
 | `Domovoi`       | Makes node use executing contract state for the contract call permissions check instead of the state stored in the native Management contract. In C# also makes System.Runtime.GetNotifications interop properly count stack references of notification parameters which prevents users from creating objects that exceed MaxStackSize constraint, but NeoGo has never had this bug, thus proper behaviour is preserved even before HFDomovoi. It results in the fact that some T5 testnet transactions have different ApplicationLogs compared to the C# node, but the node states match. | https://github.com/nspcc-dev/neo-go/pull/3476 <br> https://github.com/neo-project/neo/pull/3290 <br> https://github.com/nspcc-dev/neo-go/pull/3473 <br> https://github.com/neo-project/neo/pull/3290 <br> https://github.com/neo-project/neo/pull/3301 <br> https://github.com/nspcc-dev/neo-go/pull/3485 |
 | `Echidna`       | Introduces `Designation` event extension with `Old` and `New` roles data to native RoleManagement contract. Adds support for `base64UrlEncode` and `base64UrlDecode` methods to native StdLib contract. Extends the list of required call flags for `registerCandidate`, `unregisterCandidate`and `vote` methods of native NeoToken contract with AllowNotify flag. Enables `onNEP17Payment` method of NEO contract for candidate registration. Introduces constraint for maximum number of execution notifications. Adds support for `recoverSecp256K1` method of native CryptoLib contract. Introduces `setMillisecondsPerBlock` and `getMillisecondsPerBlock` methods of native Policy contract. Introduces support for NotaryAssisted transaction attribute and native Notary contract. | https://github.com/nspcc-dev/neo-go/pull/3554 <br> https://github.com/nspcc-dev/neo-go/pull/3761 <br> https://github.com/nspcc-dev/neo-go/pull/3554 <br> https://github.com/neo-project/neo/pull/3597 <br> https://github.com/nspcc-dev/neo-go/pull/3700 <br> https://github.com/nspcc-dev/neo-go/pull/3640 <br> https://github.com/neo-project/neo/pull/3548 <br> https://github.com/nspcc-dev/neo-go/pull/3863 <br> https://github.com/neo-project/neo/pull/3696 <br> https://github.com/neo-project/neo/pull/3895 <br> https://github.com/nspcc-dev/neo-go/pull/3835 <br> https://github.com/nspcc-dev/neo-go/pull/3854 <br> https://github.com/neo-project/neo/pull/3175 <br> https://github.com/nspcc-dev/neo-go/pull/3478 <br> https://github.com/neo-project/neo/pull/3178 |
-| `Faun`          | Adds `getBlockedAccounts` method to native Policy contract. | https://github.com/nspcc-dev/neo-go/pull/3932 <br> https://github.com/nspcc-dev/neo-go/pull/4004 <br> https://github.com/neo-project/neo/pull/4147 <br> https://github.com/neo-project/neo/pull/4150 |
+| `Faun`          | Adds `getBlockedAccounts` method to native Policy contract. Adds `hexEncode` and `hexDecode` methods to native StdLib contract. | https://github.com/nspcc-dev/neo-go/pull/3932 <br> https://github.com/nspcc-dev/neo-go/pull/4004 <br> https://github.com/neo-project/neo/pull/4147 <br> https://github.com/neo-project/neo/pull/4150 |
 
 ## DB compatibility