Udev rules: use non-ancient comma syntax

This file is old as dirt. It's entirely possible that commas were
optional in udev back at that time. But they're definitely supposed to
be there nowadays.

Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Pavel Zakharov <[email protected]>
Signed-off-by: Justin Gottula <[email protected]>
Closes openzfs#12302

Author: jgottula

udev/rules.d/60-zvol.rules.in

@@ -3,4 +3,4 @@
 # persistent disk links: /dev/zvol/dataset_name
 # also creates compatibility symlink of /dev/dataset_name
 
-KERNEL=="zd*" SUBSYSTEM=="block" ACTION=="add|change" PROGRAM="@udevdir@/zvol_id $tempnode" SYMLINK+="zvol/%c %c"
+KERNEL=="zd*", SUBSYSTEM=="block", ACTION=="add|change", PROGRAM="@udevdir@/zvol_id $tempnode", SYMLINK+="zvol/%c %c"