MDEV-25617 10.5.10 upgrade: "scriptlet / line 6 : [: is-active : bina…

…ry operator expected"

support-files/rpm/server-posttrans.sh

@@ -3,7 +3,7 @@ if [ -r %{restart_flag} ] ; then
   # only restart the server if it was alredy running
   if [ -x /usr/bin/systemctl ] ; then
     /usr/bin/systemctl daemon-reload > /dev/null 2>&1
-    if [ /usr/bin/systemctl is-active mysql ]; then
+    if /usr/bin/systemctl is-active mysql; then
       /usr/bin/systemctl restart mysql > /dev/null 2>&1
     else
       /usr/bin/systemctl try-restart mariadb.service > /dev/null 2>&1