fix spdx path

Author: andrew-fleming

contracts/src/token/witnesses/MultiTokenWitnesses.ts

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-// OpenZeppelin Compact Contracts v0.0.1-alpha.1 (token/witnesses/MultiToken.ts)
+// OpenZeppelin Compact Contracts v0.0.1-alpha.1 (token/witnesses/MultiTokenWitnesses.ts)
 
 // This is how we type an empty object.
 export type MultiTokenPrivateState = Record<string, never>;