Update README

Author: chicong065

README.md

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     <source srcset="https://raw.githubusercontent.com/chicong065/jsonpath-engine/main/assets/banner-dark.svg" media="(prefers-color-scheme: dark)">
     <source srcset="https://raw.githubusercontent.com/chicong065/jsonpath-engine/main/assets/banner-light.svg" media="(prefers-color-scheme: light)">
-    <img alt="jsonpath-engine banner" src="https://raw.githubusercontent.com/chicong065/jsonpath-engine/main/assets/banner-dark.svg" height="60">                         
+    <img alt="jsonpath-engine banner" src="https://raw.githubusercontent.com/chicong065/jsonpath-engine/main/assets/banner-dark.svg" height="100">                         
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-</p>
-<p align="center">TypeScript-first, RFC 9535-compliant JSONPath query engine.</p>
+</h1>
+<h3 align="center">TypeScript-first, RFC 9535-compliant JSONPath query engine.</h3>
 <br/>
 
 JSONPath is a small query language for JSON, in the same spirit as XPath for XML or CSS selectors for the DOM. `jsonpath-engine` implements [RFC 9535](https://www.rfc-editor.org/rfc/rfc9535), the IETF standard that defines JSONPath's syntax, semantics, and well-typedness rules.