samples: drivers: watchdog: Pause during debugging

Enable the option to pause the watchdog if the MCU is halted by a
debugger.

This fixes an issue with some Nordic MCUs (see #33509) where the board
could not be flashed anymore if a short watchdog timeout (<100 ms) was
used.

Signed-off-by: Martin Jäger <martin@libre.solar>

samples/drivers/watchdog/src/main.c

diff --git a/samples/drivers/watchdog/src/main.c b/samples/drivers/watchdog/src/main.c
index 2188a7b..a7a8893 100644
--- a/samples/drivers/watchdog/src/main.c
+++ b/samples/drivers/watchdog/src/main.c
@@ -123,7 +123,7 @@
 		return;
 	}
 
-	err = wdt_setup(wdt, 0);
+	err = wdt_setup(wdt, WDT_OPT_PAUSE_HALTED_BY_DBG);
 	if (err < 0) {
 		printk("Watchdog setup error\n");
 		return;