modified instalation with pypi to warn about cupy on rocm

Author: DavidRamosArchilla

Diff for: docs/source/installation/installation_pypi.rst

@@ -21,7 +21,8 @@ A GPU-supported version of the tool can be installed directly from PyPI using th
 Note that the ``cuda12x`` can be exchanged by:
 
 - ``cuda``: Triggers the non-compiled version of ``cupy`` so that it builds specifically for your system.
-- ``rocm-4-0``: Deploys a version of ``cupy`` tailored for AMD GPUs using ROCM.
+- ``rocm-4-0``: in order to deploy a version of ``cupy`` tailored for AMD GPUs using ROCM. ROCM is still experimental. Please be aware that the CUDA/ROCM version should match the ones in your system.
+
 
 Optional Modules
 ----------------