EEI: Fix typo

Author: chfast

eth_interface.md

@@ -455,7 +455,7 @@ from last executed `call`, `callCode`, `callDelegate`, `callStatic` or `create`.
 Mark account for later deletion and give the remaining balance to the specified
 beneficiary address. This takes effect once the contract execution terminates.
 
-*Note*: multiple invocations will overwrite the benficiary address.
+*Note*: multiple invocations will overwrite the beneficiary address.
 
 *Note*: the contract **shall** halt execution after this call.