MAINTAINERS: Update HiSilicon GPIO driver maintainer

Add Yang Shen as the maintainer of the HiSilicon GPIO driver,
replacing Jay Fang.

Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Jay Fang <f.fangjian@huawei.com>
Link: https://lore.kernel.org/r/20250529034023.3780376-1-shenyang39@huawei.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Yang Shen

MAINTAINERS

@@ -10839,7 +10839,7 @@ S:	Maintained
 F:	drivers/dma/hisi_dma.c
 
 HISILICON GPIO DRIVER
-M:	Jay Fang <f.fangjian@huawei.com>
+M:	Yang Shen <shenyang39@huawei.com>
 L:	linux-gpio@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/gpio/hisilicon,ascend910-gpio.yaml