typo-Update README.md

[romashka-btc]

Fix: Corrected typo in README.md

Changes

1. File: zkdrops-lib/README.md

   • Corrected "Reciever" to "Receiver".

   • Before:

          Reciever 
     

   • After:

         Receiver 
     

Purpose

• Improved documentation accuracy by fixing the typographical error.
• Enhanced the clarity and professionalism of the README file.