tests: zbus: publish_stats: Fix for non-zero boot delay

Fixes the zbus publishing statistics test to account for a non-zero boot
delay, which is often used in hardware testing environments. This fixes
an assertion failure observed on multiple max32 boards in the adi board
farm.

Signed-off-by: Maureen Helm <[email protected]>

Author: MaureenHelm

tests/subsys/zbus/publish_stats/src/main.c

@@ -25,7 +25,7 @@ ZTEST(publish_stats, test_channel_metadata)
 	zassert_equal(0, zbus_chan_pub_stats_avg_period(&chan));
 
 	/* Should be no different after a second of runtime */
-	k_sleep(K_SECONDS(1));
+	k_sleep(K_TIMEOUT_ABS_MS(1000));
 	zassert_equal(0, zbus_chan_pub_stats_count(&chan));
 	zassert_equal(0, zbus_chan_pub_stats_last_time(&chan));
 	zassert_equal(0, zbus_chan_pub_stats_avg_period(&chan));