fix: removed redundant whitespace

Author: Ph0B1uS

spec/classes/server_spec.rb

@@ -373,7 +373,7 @@
 
         let :params do
           {
-            smsdevices: '/dev/ttyS0',
+            smsdevices: ['/dev/ttyS0'],
             zabbix_version: '7.0'
           }
         end
@@ -387,7 +387,7 @@
 
         let :params do
           {
-            smsdevices: '/dev/ttyS0',
+            smsdevices: ['/dev/ttyS0'],
             zabbix_version: '7.2'
           }
         end