update readme

README.md

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 <p align="center">
 <img src="https://www.jeffro.io/assets/wiki/tx-parser/whale.png" alt="tx-parser" width="100">
 </p>
-<h1 align="center" style="font-size: 32px; font-weight: bold;">On-chain Transaction Parser</h1>
+<h2 align="center" style="font-size: 32px; font-weight: bold;">On-chain Transaction Parser</h2>
 <p align="center">A powerful library for parsing on-chain transactions into clear, human-readable actions</p>
 <p align="center">
   <a href="https://github.com/0xjeffro/tx-parser/actions">