chore: add triggers to automation (#19312)

Adds triggers package to automation @otaviomacedo 

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: peterwoodworth

.github/workflows/issue-label-assign.yml

@@ -273,5 +273,6 @@ env:
            {"area":"@aws-cdk/yaml-cfn","keywords":["(aws-yaml-cfn)","(yaml-cfn)"],"labels":["@aws-cdk/aws-yaml-cfn"],"assignees":["skinny85"]},
            {"area":"@aws-cdk/aws-apprunner","keywords":["apprunner","aws-apprunner"],"labels":["@aws-cdk/aws-apprunner"],"assignees":["corymhall"]},
            {"area":"@aws-cdk/aws-lightsail","keywords":["lightsail","aws-lightsail"],"labels":["@aws-cdk/aws-lightsail"],"assignees":["corymhall"]},
-           {"area":"@aws-cdk/aws-aps","keywords":["aps","aws-aps","prometheus"],"labels":["@aws-cdk/aws-aps"],"assignees":["corymhall"]}
+           {"area":"@aws-cdk/aws-aps","keywords":["aps","aws-aps","prometheus"],"labels":["@aws-cdk/aws-aps"],"assignees":["corymhall"]},
+           {"area":"@aws-cdk/triggers","keywords":["trigger","aws-cdk/triggers","triggers"],"labels":["@aws-cdk/triggers"],"assignees":["otaviomacedo"]}
            ]