docs: fix a typo in the M48, M49 link text
docs: fix a typo in the M48, M49 link text

The links to M48 & M49 were broken, this commit fixes them.

M48 and M49 are in the same section, so combine their entry in the TOC.

kinsamanka/machinekit,RunningLight/machinekit,jaguarcat79/ILC-with-LinuxCNC,aschiffler/linuxcnc,araisrobo/machinekit,narogon/linuxcnc,ianmcmahon/linuxcnc-mirror,unseenlaser/linuxcnc,mhaberler/machinekit,EqAfrica/machinekit,unseenlaser/machinekit,mhaberler/machinekit,aschiffler/linuxcnc,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,kinsamanka/machinekit,ianmcmahon/linuxcnc-mirror,RunningLight/machinekit,bmwiedemann/linuxcnc-mirror,RunningLight/machinekit,ianmcmahon/linuxcnc-mirror,ArcEye/machinekit-testing,ArcEye/machinekit-testing,araisrobo/machinekit,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,EqAfrica/machinekit,ArcEye/MK-Qt5,ArcEye/MK-Qt5,RunningLight/machinekit,ikcalB/linuxcnc-mirror,unseenlaser/machinekit,cdsteinkuehler/MachineKit,strahlex/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/linuxcnc,aschiffler/linuxcnc,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,jaguarcat79/ILC-with-LinuxCNC,RunningLight/machinekit,Cid427/machinekit,narogon/linuxcnc,mhaberler/machinekit,cdsteinkuehler/MachineKit,Cid427/machinekit,Cid427/machinekit,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,araisrobo/machinekit,jaguarcat79/ILC-with-LinuxCNC,araisrobo/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,unseenlaser/linuxcnc,mhaberler/machinekit,EqAfrica/machinekit,strahlex/machinekit,bobvanderlinden/machinekit,bobvanderlinden/machinekit,ArcEye/machinekit-testing,bmwiedemann/linuxcnc-mirror,EqAfrica/machinekit,cdsteinkuehler/linuxcnc,cdsteinkuehler/MachineKit,kinsamanka/machinekit,mhaberler/machinekit,araisrobo/machinekit,cdsteinkuehler/linuxcnc,kinsamanka/machinekit,araisrobo/machinekit,RunningLight/machinekit,bobvanderlinden/machinekit,unseenlaser/linuxcnc,narogon/linuxcnc,kinsamanka/machinekit,aschiffler/linuxcnc,Cid427/machinekit,Cid427/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,araisrobo/machinekit,bobvanderlinden/machinekit,Cid427/machinekit,strahlex/machinekit,EqAfrica/machinekit,EqAfrica/machinekit,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,bmwiedemann/linuxcnc-mirror,RunningLight/machinekit,unseenlaser/machinekit,ikcalB/linuxcnc-mirror,bobvanderlinden/machinekit,strahlex/machinekit,kinsamanka/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,unseenlaser/linuxcnc,Cid427/machinekit,ArcEye/MK-Qt5,cdsteinkuehler/MachineKit,RunningLight/machinekit,ArcEye/MK-Qt5,bobvanderlinden/machinekit,EqAfrica/machinekit,strahlex/machinekit,cdsteinkuehler/linuxcnc,narogon/linuxcnc,ArcEye/machinekit-testing,cdsteinkuehler/MachineKit,unseenlaser/linuxcnc,ArcEye/MK-Qt5,mhaberler/machinekit,aschiffler/linuxcnc,araisrobo/machinekit,ArcEye/MK-Qt5,strahlex/machinekit,ikcalB/linuxcnc-mirror,kinsamanka/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,bmwiedemann/linuxcnc-mirror,strahlex/machinekit,bobvanderlinden/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,cdsteinkuehler/MachineKit,cdsteinkuehler/linuxcnc,cdsteinkuehler/linuxcnc,ikcalB/linuxcnc-mirror,araisrobo/machinekit,ianmcmahon/linuxcnc-mirror,mhaberler/machinekit,jaguarcat79/ILC-with-LinuxCNC,narogon/linuxcnc,mhaberler/machinekit