Minor clarification in staking as validators procedures #1691

* Update staking.adoc

* codereview

---------

Co-authored-by: Raz Landau <[email protected]>

Author: saniksin

modules/architecture/pages/staking.adoc

@@ -257,10 +257,11 @@ To invoke onchain contracts, use https://foundry-rs.github.io/starknet-foundry/s
 
 | Staking
 | Invoke the staking contract's https://github.com/starkware-libs/starknet-staking/blob/main/docs/spec.md#stake[`stake`^] function
-a| * You should make sure you are xref:responsibilities[running a full node and attesting to blocks] before staking
+a| * You should make sure you are xref:responsibilities[running a fully synchronized node] before staking.
 * You must first approve the transfer of the amount of STRK tokens to be staked to the staking contract by invoking the STRK contract's `approve` function
 * `operational_address` should have sufficient funds to pay for attestation transactions
 * `amount` should be equal or greater than the xref:protocol[minimum stake for validators] and denominated in FRI (i.e., 1*10^18^ = 1 STRK)
+* Attesting to blocks is only possible starting from the epoch following a successful stake
 
 | Initializing or updating commission
 | Invoke the staking contract's https://github.com/starkware-libs/starknet-staking/blob/main/docs/spec.md#set_commission[`set_commission`^] function