added link to documentation (#416)

README.md

@@ -1,5 +1,8 @@
 # hipCUB
 
+> [!NOTE]
+> The published documentation is available at [hipCUB](https://rocm.docs.amd.com/projects/hipCUB/en/latest/index.html) in an organized, easy-to-read format, with search and a table of contents. The documentation source files reside in the `docs` folder of this repository. As with all ROCm projects, the documentation is open source. For more information on contributing to the documentation, see [Contribute to ROCm documentation](https://rocm.docs.amd.com/en/latest/contribute/contributing.html).
+
 hipCUB is a thin wrapper library on top of
 [rocPRIM](https://github.com/ROCm/rocPRIM) or
 [CUB](https://github.com/thrust/cub). You can use it to port a CUB project into