Pin doc-validator image version to allow repository to opt in to breaking changes (#61456)
Signed-off-by: Jack Baldry <jack.baldry@grafana.com>
Signed-off-by: Jack Baldry <jack.baldry@grafana.com>
(cherry picked from commit 017d4f2cbb)
Co-authored-by: Jack Baldry <jack.baldry@grafana.com>