docs: Replace Documentation badge with CI status badge in README

- Updated the "Documentation" badge to a "CI" badge to reflect the CI status of the project.
- Updated the URL and link in the badge to point to the correct GitHub Actions workflow.

Author: ain1084

README.md

@@ -1,7 +1,7 @@
 # @ain1084/array-buffer-partitioner
 
 [![npm version](https://badge.fury.io/js/@ain1084%2Farray-buffer-partitioner.svg)](https://badge.fury.io/js/@ain1084%2Farray-buffer-partitioner)
-[![Documentation](https://github.com/ain1084/array-buffer-partitioner/workflows/docs/badge.svg)](https://github.com/ain1084/array-buffer-partitioner/actions?query=workflow%3Adocs)
+[![CI](https://github.com/ain1084/array-buffer-partitioner/workflows/ci/badge.svg)](https://github.com/ain1084/array-buffer-partitioner/actions?query=workflow%3Aci)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)