readme: update for the new showWifi config option (#1108)

Signed-off-by: Dan Griffiths <dgriffiths@widgitlabs.com>

Author: evertiro

README.md

@@ -389,6 +389,7 @@ default, you must create it manually.
             "showKbLayout": false,
             "showMicrophone": false,
             "showNetwork": true,
+            "showWifi": true,
             "showLockStatus": true
         },
         "tray": {
@@ -682,7 +683,7 @@ The module automatically adds Caelestia shell to the path with **full functional
 
 ### Need help or support?
 
-You can join the community Discord server for assistance and discussion:  
+You can join the community Discord server for assistance and discussion:
 https://discord.gg/BGDCFCmMBk
 
 ### My screen is flickering, help pls!