e2e_tests check don't work on a PR from a fork due to AWS' configure-aws-credentials bug

[activescott]

It seems this is an issue other experience per aws-actions/configure-aws-credentials#564

This exact action is at

serverless-aws-static-file-handler/.github/workflows/build.yml

Line 109 in a562cfb

uses: aws-actions/configure-aws-credentials@v1

and an example of the failure is linked in the bug above.