Issue: #7944 External notification module: Adjusted default nag timeout to 15s (from 60s) (#7946)

* External notification module: Adjusted default nag timeout to 5s (from 60s)

* Change nag to 15s

---------

Co-authored-by: Tom Fifield <tom@tomfifield.net>

src/mesh/Default.h

@@ -27,7 +27,7 @@
 #ifdef USERPREFS_RINGTONE_NAG_SECS
 #define default_ringtone_nag_secs USERPREFS_RINGTONE_NAG_SECS
 #else
-#define default_ringtone_nag_secs 60
+#define default_ringtone_nag_secs 15
 #endif
 
 #define default_mqtt_address "mqtt.meshtastic.org"
@@ -84,4 +84,4 @@ class Default
             return 1.0 + (nodesOverForty * throttlingFactor); // Each number of online node scales by 0.075 (default)
         }
     }
-};
+};