Update ERC-6506: fix typos (#812)

Co-authored-by: Sam Wilson <[email protected]>

Author: dxsullivan

ERCS/erc-6506.md

@@ -104,7 +104,7 @@ Upon the claiming of the bribe the recipient would simply open the commitment, w
 
 #### *Compatibility with Off-Chain Voting*
 
-Many DAO's operate off-chain, typically through voting platforms like snapshot. This sytem does allow for such compatibility using known signature data. Consider the following example
+Many DAO's operate off-chain, typically through voting platforms like snapshot. This system does allow for such compatibility using known signature data. Consider the following example
 
 1. User A commits an incentive to user B to vote on snapshot. User B votes.
 2. Once the deadline has passed, a challenge window is initiated. The incentivizer has a predetermined window to demonstrate that the bribe was not honored. This can be done by simply passing to the contract a signature signed by User B voting in the opposite direction of the bribe. If the signature can be verified, then the arrangement was not honored and funds can be safely released back to user A.