docs: x11 -> X11
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6915>
diff --git a/docs/ci/index.rst b/docs/ci/index.rst
index d5ec473..f175dd7 100644
--- a/docs/ci/index.rst
+++ b/docs/ci/index.rst
@@ -65,7 +65,7 @@
`mesa-ci-results.jf.intel.com <http://mesa-ci-results.jf.intel.com>`__.
The Intel CI runs a much larger array of tests, on a number of generations
-of Intel hardware and on multiple platforms (x11, wayland, drm & android),
+of Intel hardware and on multiple platforms (X11, wayland, drm & android),
with the purpose of detecting regressions.
Tests include
`Crucible <https://gitlab.freedesktop.org/mesa/crucible>`__,
