Add Nathanael to CODEOWNERS for Azure IoT SDK (Azure#30070)

Author: ngastelum-ms

.github/CODEOWNERS

@@ -319,7 +319,7 @@
 
 # PRLabel: %IoT Models Repository
 # ServiceLabel: %IoT Models Repository %Service Attention
-/sdk/modelsrepository/                              @drwill-ms @timtay-microsoft @abhipsaMisra @digimaun @brycewang-microsoft @andyk-ms @tmahmood-microsoft
+/sdk/modelsrepository/                              @drwill-ms @timtay-microsoft @abhipsaMisra @digimaun @brycewang-microsoft @andyk-ms @tmahmood-microsoft @ngastelum-ms
 
 # PRLabel: %TimeSeriesInsights
 # ServiceLabel: %TimeSeriesInsights %Service Attention
@@ -366,7 +366,7 @@
 #/<NotInRepo>/            @madhurinms
 
 # PRLabel: %Iot
-/sdk/iot/                               @drwill-ms @timtay-microsoft @abhipsaMisra @andyk-ms @brycewang-microsoft @tmahmood-microsoft
+/sdk/iot/                               @drwill-ms @timtay-microsoft @abhipsaMisra @andyk-ms @brycewang-microsoft @tmahmood-microsoft @ngastelum-ms
 
 # ServiceLabel: %IotCentral %Service Attention
 /sdk/iotcentral/Microsoft.Azure.Management.IotCentral/           @iluican @jlian
@@ -376,7 +376,7 @@
 
 # PRLabel: %IotHub
 # ServiceLabel: %IotHub %Service Attention
-/sdk/iothub/                            @drwill-ms @timtay-microsoft @abhipsaMisra @andyk-ms @brycewang-microsoft @tmahmood-microsoft
+/sdk/iothub/                            @drwill-ms @timtay-microsoft @abhipsaMisra @andyk-ms @brycewang-microsoft @tmahmood-microsoft @ngastelum-ms
 
 # ServiceLabel: %IotHub %Service Attention
 /sdk/iothub/Microsoft.Azure.Management.IotHub/            @rkmanda @chieftn