Update EIP-2935: Fix Ring Buffer Size in Description

Merged by EIP-Bot.

Author: pcaversaccio

EIPS/eip-2935.md

@@ -1,7 +1,7 @@
 ---
 eip: 2935
 title: Serve historical block hashes from state
-description: Store and serve last 8192 block hashes as storage slots of a system contract to allow for stateless execution
+description: Store and serve last 8191 block hashes as storage slots of a system contract to allow for stateless execution
 author: Vitalik Buterin (@vbuterin), Tomasz Stanczak (@tkstanczak), Guillaume Ballet (@gballet), Gajinder Singh (@g11tech), Tanishq Jasoria (@tanishqjasoria), Ignacio Hagopian (@jsign), Jochem Brouwer (@jochem-brouwer), Sina Mahmoodi (@s1na)
 discussions-to: https://ethereum-magicians.org/t/eip-2935-save-historical-block-hashes-in-state/4565
 status: Last Call