fix typo

Author: ScottyPoi

packages/testdata/src/signers.ts

@@ -1,7 +1,7 @@
 import { Address, hexToBytes } from '@ethereumjs/util'
 
 /**
- * Commen set of Signers for internal test construction.
+ * Common set of Signers for internal test construction.
  * Sets of privateKeys, publicKeys, and addresses
  * Use these signers in test construction instead of hardcoding or constructing new signers.
  */