docs: reference to OS section

README.md

@@ -258,7 +258,7 @@ For running linters from GitHub actions locally, you need to do the following.
 - [Niek Mereu](https://github.com/niekstrv)
 - [Vladimír Kadlec](https://github.com/vladimirkadlec-strv)
 
-## <a name="openSearch">:scroll: OpenSearch</a>
+## <a name="opensearch">:scroll: OpenSearch</a>
 This section contains a brief overview of OpenSearch. This section is by no means complete or exhaustive. However, it contains a few tips and tricks that might be useful for the development of your OpenSearch project. For more information, visit the [OpenSearch documentation](https://opensearch.org/docs/latest/index/).
 
 ### <a name="analyzers">:clipboard: Analyzers</a>