bindings: i2c: correct description for GigaDevice GD32 I2C

Updated the description in the gd,gd32-i2c.yaml file to reflect the
correct name "GigaDevice" instead of "GigiDevice".

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

dts/bindings/i2c/gd,gd32-i2c.yaml

@@ -1,7 +1,7 @@
 # Copyright (c) 2021 BrainCo Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-description: GigiDevice GD32 I2C
+description: GigaDevice GD32 I2C
 
 compatible: "gd,gd32-i2c"