Make the logo clickable and redirect to project website (#19126)

Signed-off-by: Sandesh Kumar <[email protected]>

Author: sandeshkr419

README.md

@@ -1,4 +1,6 @@
-<img src="https://opensearch.org/assets/img/opensearch-logo-themed.svg" height="64px">
+<a href="https://opensearch.org/">
+  <img src="https://opensearch.org/assets/img/opensearch-logo-themed.svg" height="64px">
+</a>
 
 [![LFX Health Score](https://insights.production.lfx.dev/api/badge/health-score?project=opensearch-foundation)](https://insights.linuxfoundation.org/project/opensearch-foundation)
 [![LFX Active Contributors](https://insights.production.lfx.dev/api/badge/active-contributors?project=opensearch-foundation&repos=https://github.com/opensearch-project/OpenSearch)](https://insights.linuxfoundation.org/project/opensearch-foundation/repository/opensearch-project-opensearch)