Fix mistake in command execution parameter

Invoking cadvisor sent the command line parameter `-storage_driver_user` twice, once passing `cfg.storageDriverHost`. Fix the typo and pass the host config option to the command line parameter `-storage_driver_host`

Changed files
+1 -1
nixos
modules
services
monitoring
+1 -1
nixos/modules/services/monitoring/cadvisor.nix
···
${escapeShellArgs cfg.extraOptions} \
${optionalString (cfg.storageDriver != null) ''
-storage_driver "${cfg.storageDriver}" \
-
-storage_driver_user "${cfg.storageDriverHost}" \
+
-storage_driver_host "${cfg.storageDriverHost}" \
-storage_driver_db "${cfg.storageDriverDb}" \
-storage_driver_user "${cfg.storageDriverUser}" \
-storage_driver_password "$(cat "${cfg.storageDriverPasswordFile}")" \