Use new PubSubClient

Author: rob040

platformio.ini

@@ -24,7 +24,7 @@ lib_deps =
   # now internal: khoih-prog/ESP_WiFiManager_Lite@^1.10.5
   Adafruit GFX Library@^1.12
   PaulStoffregen/Time@^1.6
-  knolleary/PubSubClient@^2.8
+  hmueller01/pubsubclient3@^3.2.0
   ArduinoJson@^7.4
 
 [env:default]