boot: zephyr: fix s/junping/jumping/ typo

Fix typo in Kconfig help text by s/junping/jumping/.

Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev>
diff --git a/boot/zephyr/Kconfig b/boot/zephyr/Kconfig
index 67ac4a6..8a73728 100644
--- a/boot/zephyr/Kconfig
+++ b/boot/zephyr/Kconfig
@@ -149,7 +149,7 @@
 	default y
 	help
 	  This option instructs MCUboot to perform a clean-up of a set of
-	  architecture core HW registers before junping to the application
+	  architecture core HW registers before jumping to the application
 	  firmware. The clean-up sets these registers to their warm-reset
 	  values as specified by the architecture.