config example in README.md corrections/issues

[austimkelly]

I dropped a PR here to get the config example working: #317

however, it does not work against the master branch giving me some sarif upload errors. As such, the PR uses a SHA that does work for now. I'm hoping someone at aquasec can help me figure out the cause of the error when running config against master or recommend a version I should be using.

Thanks!