fix(docs): replace deprecated aliases in komorebi.bar.example.json

This commit ensures that we are using show_total_activity and
show_activity instead of show_total_data_transmitted and
show_network_activity in the komorebi.bar.example.json file which is
populated for users in the quickstart command.

JSONSchema is not smart enough to resolve aliases for backwards compat,
which results in confusing behaviour for new users trying to edit this
file.

fix #1596

docs/komorebi.bar.example.json

@@ -48,8 +48,8 @@
     {
       "Network": {
         "enable": true,
-        "show_total_data_transmitted": true,
-        "show_network_activity": true
+        "show_activity": true,
+        "show_total_activity": true
       }
     },
     {