update contributors number related with cortx-motr
[![Slack](https://img.shields.io/badge/chat-on%20Slack-blue")](https://cortx.link/join-slack)
[![YouTube](https://img.shields.io/badge/Video-YouTube-red)](https://cortx.link/videos)
[![Latest Release](https://img.shields.io/github/v/release/Seagate/cortx?label=Latest%20Release)](https://github.com/seagate/cortx/releases/latest)
-[![GitHub contributors](https://img.shields.io/github/contributors/Seagate/cortx)](https://github.com/Seagate/cortx/graphs/contributors/)
+[![GitHub contributors](https://img.shields.io/github/contributors/Seagate/cortx-motr)](https://github.com/Seagate/cortx-motr/graphs/contributors/)
[![SODA Eco project](https://img.shields.io/badge/SODA-ECO%20Project-9cf)](./doc/Soda-welcome-page.md)
At the core of [CORTX](https://github.com/Seagate/cortx) lies Motr. Motr is a distributed object storage system, targeting [mass capacity storage](https://www.seagate.com/products/storage/object-storage-software/)
