docs/boards/esp32-devkitc: Fix watchdog example
@@ -548,9 +548,9 @@ example.
To test it, just run the following::
- nsh> wdog -d /dev/watchdogx
+ nsh> wdog -i /dev/watchdogx
-Where x in the watchdog instance.
+Where x is the watchdog instance.
wifinsh
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