docs: check links in spanish docs, but only warn on failure
docs: check links in spanish docs, but only warn on failure

There are plenty of broken links in the Spanish docs.  This commit will
report on them but not fail the build because of them.

bobvanderlinden/machinekit,Cid427/machinekit,ikcalB/linuxcnc-mirror,araisrobo/machinekit,RunningLight/machinekit,RunningLight/machinekit,bmwiedemann/linuxcnc-mirror,mhaberler/machinekit,bobvanderlinden/machinekit,mhaberler/machinekit,RunningLight/machinekit,mhaberler/machinekit,cdsteinkuehler/linuxcnc,ArcEye/MK-Qt5,kinsamanka/machinekit,strahlex/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,ikcalB/linuxcnc-mirror,bobvanderlinden/machinekit,cdsteinkuehler/linuxcnc,RunningLight/machinekit,EqAfrica/machinekit,Cid427/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,araisrobo/machinekit,RunningLight/machinekit,ikcalB/linuxcnc-mirror,Cid427/machinekit,mhaberler/machinekit,Cid427/machinekit,ArcEye/MK-Qt5,EqAfrica/machinekit,ikcalB/linuxcnc-mirror,araisrobo/machinekit,unseenlaser/machinekit,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,ArcEye/machinekit-testing,cdsteinkuehler/linuxcnc,araisrobo/machinekit,ArcEye/machinekit-testing,kinsamanka/machinekit,kinsamanka/machinekit,strahlex/machinekit,ArcEye/MK-Qt5,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,Cid427/machinekit,kinsamanka/machinekit,bobvanderlinden/machinekit,mhaberler/machinekit,Cid427/machinekit,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,EqAfrica/machinekit,RunningLight/machinekit,RunningLight/machinekit,ArcEye/machinekit-testing,unseenlaser/machinekit,araisrobo/machinekit,araisrobo/machinekit,kinsamanka/machinekit,kinsamanka/machinekit,strahlex/machinekit,EqAfrica/machinekit,ArcEye/machinekit-testing,strahlex/machinekit,EqAfrica/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,araisrobo/machinekit,ArcEye/MK-Qt5,araisrobo/machinekit,ikcalB/linuxcnc-mirror,unseenlaser/machinekit,mhaberler/machinekit,bmwiedemann/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,mhaberler/machinekit,mhaberler/machinekit,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,bobvanderlinden/machinekit,ArcEye/machinekit-testing,strahlex/machinekit,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,unseenlaser/machinekit,cdsteinkuehler/linuxcnc,strahlex/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,strahlex/machinekit,cdsteinkuehler/linuxcnc,Cid427/machinekit,bmwiedemann/linuxcnc-mirror,Cid427/machinekit,RunningLight/machinekit,ArcEye/MK-Qt5,ArcEye/machinekit-testing,ArcEye/MK-Qt5,bobvanderlinden/machinekit,kinsamanka/machinekit,araisrobo/machinekit