Update README.md

Author: gsidhwani-nr

README.md

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-[![New Relic Experimental header](https://github.com/newrelic/opensource-website/raw/master/src/images/categories/Experimental.png)](https://opensource.newrelic.com/oss-category/#new-relic-experimental)
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+<a href="https://opensource.newrelic.com/oss-category/#new-relic-experimental"><picture><source media="(prefers-color-scheme: dark)" srcset="https://github.com/newrelic/opensource-website/raw/main/src/images/categories/dark/Experimental.png"><source media="(prefers-color-scheme: light)" srcset="https://github.com/newrelic/opensource-website/raw/main/src/images/categories/Experimental.png"><img alt="New Relic Open Source experimental project banner." src="https://github.com/newrelic/opensource-website/raw/main/src/images/categories/Experimental.png"></picture></a>
 
 ![GitHub forks](https://img.shields.io/github/forks/newrelic-experimental/newrelic-java-ws-rs-errors?style=social)
 ![GitHub stars](https://img.shields.io/github/stars/newrelic-experimental/newrelic-java-ws-rs-errors?style=social)