docs: change header size

Author: sagold

README.md

@@ -1,10 +1,10 @@
 [![Npm package version](https://badgen.net/npm/v/json-schema-library)](https://github.com/sagold/json-schema-library/actions/workflows/ci.yaml) [![CI](https://github.com/sagold/json-schema-library/actions/workflows/ci.yaml/badge.svg)](https://github.com/sagold/json-schema-library/actions/workflows/ci.yaml) ![Types](https://badgen.net/npm/types/json-schema-library)
 
-<h1 align="center">
-    <img src="./docs/json-schema-library-10.png" width="192" alt="json-schema-library">
+<h2 align="center">
+    <img src="./docs/json-schema-library-10.png" width="210" alt="json-schema-library">
     <br/>
     ✨ json-schema-library ✨
-</h1>
+</h2>
 
 > **json-schema-library** provides tools and utilities for working with JSON Schema - enabling creation, validation, and schema exploration. Unlike most validators and editors, which hide the inner workings, this library is designed for developers building custom tools around JSON Schema. It runs in both Node and browser environments, prioritizing flexibility and extensibility over minimal memory footprint or raw performance.