CODEOWNERS: Add LingaoM for bbc_microbit_v2 board

Add myself as codeowner for the bbc_microbit_v2 driver

Signed-off-by: Lingao Meng <menglingao@xiaomi.com>
diff --git a/CODEOWNERS b/CODEOWNERS
index f801a58..87f207a 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -91,6 +91,7 @@
 /boards/arm/96b_stm32_sensor_mez/         @Mani-Sadhasivam
 /boards/arm/96b_wistrio/                  @Mani-Sadhasivam
 /boards/arm/arduino_due/                  @ioannisg
+/boards/arm/bbc_microbit_v2/              @LingaoM
 /boards/arm/blackpill_f401ce/             @coderkalyan
 /boards/arm/blackpill_f411ce/             @coderkalyan
 /boards/arm/cc1352r1_launchxl/            @bwitherspoon