doc: Improve README

Author: anubhav756

README.md

@@ -321,4 +321,4 @@ If you encounter issues or have questions, please check the existing [GitHub
 Issues](https://github.com/googleapis/genai-toolbox/issues) for the main Toolbox
 project. If your issue is specific to one of the SDKs, please look for existing
 issues [here](https://github.com/googleapis/mcp-toolbox-sdk-python/issues) or
-open a new issue in that repository.
+open a new issue in this repository.