nodejs8.10 is no longer supported

[cfehring]

When running the SecurityHubFindingsToSlack.json template in us-west-2, it fails and rolls back with the error:

The runtime parameter of nodejs8.10 is no longer supported for creating or updating AWS Lambda functions. We recommend you use the new runtime (nodejs12.x) while creating or updating functions. (Service: AWSLambdaInternal; Status Code: 400; Error Code: InvalidParameterValueException...

I don't see a version number but the latest commit on that file was:
c858302
on Aug 9, 2019

Line 208 of SecurityHubFindingsToSlack.json says:
"Runtime": "nodejs8.10"

Per https://aws.amazon.com/blogs/compute/node-js-12-x-runtime-now-available-in-aws-lambda/
"After January 6, 2020, you can no longer create a Node.js 8.10 Lambda function"