chore(deps): update dependency google-cloud-iot to v2.6.3 (#394)

Author: renovate-bot

samples/api-client/accesstoken_example/requirements.txt

@@ -3,7 +3,7 @@ flaky==3.7.0
 google-api-python-client==2.63.0
 google-auth-httplib2==0.1.0
 google-auth==2.12.0
-google-cloud-iot==2.6.2
+google-cloud-iot==2.6.3
 google-cloud-pubsub==2.13.7
 google-cloud-storage==2.5.0
 paho-mqtt==1.6.1

samples/api-client/manager/requirements.txt

@@ -3,7 +3,7 @@ flaky==3.7.0
 google-api-python-client==2.63.0
 google-auth-httplib2==0.1.0
 google-auth==2.12.0
-google-cloud-iot==2.6.2
+google-cloud-iot==2.6.3
 google-cloud-pubsub==2.13.7
 paho-mqtt==1.6.1
 pyjwt==2.5.0