Update EIP-7251: replace check_fee with get_fee check

Merged by EIP-Bot.

EIPS/eip-7251.md

@@ -80,7 +80,7 @@ The contract has three different code paths, which can be summarized at a high l
 
 If call data input to the contract is exactly `96` bytes, perform the following:
 
-1. Ensure enough ETH was sent to cover the current consolidation request fee (`check_fee()`)
+1. Ensure enough ETH was sent to cover the current consolidation request fee (`msg.value >= get_fee()`)
 2. Increase consolidation request count by `1` for the current block (`increment_count()`)
 3. Insert a consolidation request into the queue for the source address and pubkeys of the source and the target (`insert_withdrawal_request_into_queue()`)