mrdocs warn as errors

Author: alfC

.gitlab-ci-correaa.yml

@@ -1602,7 +1602,7 @@ mrdocs:
         -DCMAKE_BUILD_TYPE=Release
         -DMULTI_BUILD_TESTS=OFF
         -DMULTI_BUILD_PACKAGE=OFF
-    - mrdocs mrdocs.yml
+    - mrdocs mrdocs.yml --warn-as-error=true
     - tree -L 3 doc/modules/reference/pages  # avoid piping to head (SIGPIPE + pipefail fails the job)
   artifacts:
     paths: