boards: st: nucleo_g431rb: fix user button polarity

The B1 user button has an active-high polarity, but was configured
active-low in the DTS file. This commit fixes that.

Fixes #75867

Signed-off-by: Lasse Fröhner <[email protected]>

Author: Finwood

boards/st/nucleo_g431rb/nucleo_g431rb.dts

@@ -43,7 +43,7 @@
 		compatible = "gpio-keys";
 		user_button: button {
 			label = "User";
-			gpios = <&gpioc 13 GPIO_ACTIVE_LOW>;
+			gpios = <&gpioc 13 GPIO_ACTIVE_HIGH>;
 			zephyr,code = <INPUT_KEY_0>;
 		};
 	};