updated wording around supported linux environments (#642)

* updated wording around supported linux environments

* Update docs/install/rocDecode-prerequisites.rst

Co-authored-by: Leo Paoletti <164940351+lpaoletti@users.noreply.github.com>

* Update docs/install/rocDecode-prerequisites.rst

Co-authored-by: Leo Paoletti <164940351+lpaoletti@users.noreply.github.com>

* SLES 15-SP5 isn't supported; removed

* updated SLES to SP6/7

---------

Co-authored-by: Rajy Rawther <Rajy.MeeyakhanRawther@amd.com>
Co-authored-by: Leo Paoletti <164940351+lpaoletti@users.noreply.github.com>

[ROCm/rocdecode commit: 2e38f502ab]

projects/rocdecode/docs/install/rocDecode-prerequisites.rst

@@ -14,11 +14,13 @@ ROCm must be installed using the AMDGPU installer with the ``rocm`` usecase:
 
   sudo amdgpu-install --usecase=rocm
 
-rocDecode can be installed on the following Linux environments:
+rocDecode has been tested on the following Linux environments:
   
-* Ubuntu 22.04, 24.04
-* RHEL 8 or 9
-* SLES: 15-SP5
+* Ubuntu 22.04 and 24.04
+* RHEL 8 and 9
+* SLES 15 SP6 and SP7
+
+See `Supported operating systems <https://rocm.docs.amd.com/projects/install-on-linux/en/latest/reference/system-requirements.html#supported-operating-systems>`_ for the complete list of ROCm supported Linux environments.
 
 The following prerequisites are installed by the package installer. If you are building and installing using the source code, use the `rocDecode-setup.py <https://github.com/ROCm/rocDecode/blob/develop/rocDecode-setup.py>`_ to install these prerequisites. 
 
@@ -35,3 +37,4 @@ The following prerequisites are installed by the package installer. If you are b
 * pkg-config
 * FFmpeg runtime and headers
 * libstdc++-12-dev for installations on Ubuntu 22.04 
+