checkstyle: fix action failures

Reviewed-by: Don Brady <dev.fs.zfs@gmail.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #15220

cmd/zed/zed.d/statechange-slot_off.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+# shellcheck disable=SC3014,SC2154,SC2086,SC2034
 #
 # Turn off disk's enclosure slot if it becomes FAULTED.
 #