MAINTAINERS: update invensense,mpu3050.yaml reference

Changeset 74978747 ("dt-bindings:iio:gyro:invensense,mpu3050: txt to yaml format conversion.")
renamed: Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.txt
to: Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.yaml.

Update its cross-reference accordingly.

Fixes: 74978747 ("dt-bindings:iio:gyro:invensense,mpu3050: txt to yaml format conversion.")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -9302,7 +9302,7 @@ INVENSENSE MPU-3050 GYROSCOPE DRIVER
 M:	Linus Walleij <linus.walleij@linaro.org>
 L:	linux-iio@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.txt
+F:	Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.yaml
 F:	drivers/iio/gyro/mpu3050*
 
 IOC3 ETHERNET DRIVER