readme: adjust image width

Author: krichprollsch

README.md

@@ -26,7 +26,10 @@ Fast web automation for AI agents, LLM training, scraping and testing:
 - Exceptionally fast execution (11x faster than Chrome)
 - Instant startup
 
-[![](https://cdn.lightpanda.io/assets/images/benchmark_2025-02-19.png)](https://github.com/lightpanda-io/demo)
+<a href="https://github.com/lightpanda-io/demo">
+<img width="400px" src="https://cdn.lightpanda.io/assets/images/benchmark_2025-02-19.png">
+</a>
+[![]()]()
 
 Puppeteer requesting 100 pages from a local website on a AWS EC2 m5.large instance.
 See [benchmark details](https://github.com/lightpanda-io/demo).