docs: Update link releases notes for 22.2.x
Some previous commits changed .gitlab-ci.yml, so the `test-docs-mr` was triggered. It failed due to the lack of toctree reference in documentation, even when the relnotes for 22.2.0 to 22.2.3 exist. This commit fixes that to make the CI pipeline green again. Signed-off-by:Guilherme Gallo <guilherme.gallo@collabora.com> Part-of: <mesa/mesa!19604>