Typo in update scripts (#2707)

* Fix typo

* Change no update function msg

ct/glpi.sh

@@ -30,7 +30,7 @@ function update_script() {
   fi
   RELEASE=$(curl -s https://api.github.com/repos/glpi-project/glpi/releases/latest | grep '"tag_name"' | sed -E 's/.*"tag_name": "([^"]+)".*/\1/')
   if [[ ! -f /opt/${APP}_version.txt ]] || [[ "${RELEASE}" != "$(cat /opt/${APP}_version.txt)" ]]; then
-    msg_error "Ther is currently no automatic update function for ${APP}."
+    msg_error "Currently we don't provide an update function for this ${APP}."
   else
     msg_ok "No update required. ${APP} is already at v${RELEASE}."
   fi