{CODEOWNERS} Add CODEOWNERS for botservice (#21968)

Signed-off-by: jiaxuwu2021 <jiaxuwu@microsoft.com>

.github/CODEOWNERS

@@ -28,6 +28,7 @@
 /src/azure-cli/azure/cli/command_modules/backup/ @dragonfly91 @zhoxing-ms @akshayneema @jsntcy
 /src/azure-cli/azure/cli/command_modules/batch/ @bgklein @gingi @dpwatrous @paterasMSFT @zhoxing-ms @jsntcy
 /src/azure-cli/azure/cli/command_modules/batchai/ @AlexanderYukhanov
+/src/azure-cli/azure/cli/command_modules/botservice/ @jiaxuwu2021 @luhan2017
 /src/azure-cli/azure/cli/command_modules/cloud/ @jiasli @evelyn-ys
 /src/azure-cli/azure/cli/command_modules/consumption/ @sandeepnl
 /src/azure-cli/azure/cli/command_modules/container/ @joseph-porter