Bump aws-actions/configure-aws-credentials from 4.2.0 to 4.2.1 (#221)

Bumps [aws-actions/configure-aws-credentials](https://github.com/aws-actions/configure-aws-credentials) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/aws-actions/configure-aws-credentials/releases)
- [Changelog](https://github.com/aws-actions/configure-aws-credentials/blob/main/CHANGELOG.md)
- [Commits](aws-actions/configure-aws-credentials@f24d719...b475783)

---
updated-dependencies:
- dependency-name: aws-actions/configure-aws-credentials
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/amplify-preview.yaml

@@ -15,7 +15,7 @@ jobs:
     environment: docs-amplify
     steps:
     - name: Configure AWS credentials
-      uses: aws-actions/configure-aws-credentials@f24d7193d98baebaeacc7e2227925dd47cc267f5 # v4.2.0
+      uses: aws-actions/configure-aws-credentials@b47578312673ae6fa5b5096b330d9fbac3d116df # v4.2.1
       with:
         aws-region: us-west-2
         role-to-assume: ${{ vars.IAM_ROLE }}