[LTP] [PATCH 2/3] doc: Clarify that the only public CI testing is build only

[Petr Vorel]

Also convert .github/workflows/ci.yml as link to github
(unfortunately that remove code formatting).

Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 doc/developers/writing_tests.rst | 4 ++--
 doc/users/supported_systems.rst  | 9 +++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/doc/developers/writing_tests.rst b/doc/developers/writing_tests.rst
index 032fbcbd5..3db56a558 100644
--- a/doc/developers/writing_tests.rst
+++ b/doc/developers/writing_tests.rst
@@ -346,8 +346,8 @@ Testing builds with GitHub Actions
 Master branch is tested in `GitHub Actions <https://github.com/linux-test-project/ltp/actions>`_
 to ensure LTP builds in various distributions, including old, current and
 bleeding edge. ``gcc`` and ``clang`` toolchains are also tested for various
-architectures using cross-compilation. For a full list of tested distros, please
-check ``.github/workflows/ci.yml``.
+architectures using cross-compilation. For a full list of tested distros, please check
+`.github/workflows/ci.yml <https://github.com/linux-test-project/ltp/blob/master/.github/workflows/ci.yml>`_.
 
 .. note::
 
diff --git a/doc/users/supported_systems.rst b/doc/users/supported_systems.rst
index 82774c2ef..a9086f4d8 100644
--- a/doc/users/supported_systems.rst
+++ b/doc/users/supported_systems.rst
@@ -3,6 +3,12 @@
 Supported systems
 =================
 
+Build testing is done with `GitHub Actions <https://github.com/linux-test-project/ltp/actions>`_.
+
+.. note::
+
+      There is no CI testing of the actual tests run.
+
 Kernel version
 --------------
 
@@ -38,6 +44,9 @@ Oldest tested distributions
       - 10.2.1
       - 11.0.1
 
+For a full list of tested distros, please tested distros, please check
+`.github/workflows/ci.yml <https://github.com/linux-test-project/ltp/blob/master/.github/workflows/ci.yml>`_.
+
 Older distributions are not officially supported, which means that it
 may or may not work. It all depends on your luck. It should be possible
 to compile latest LTP even on slightly older distributions than we
-- 
2.43.0