Bump aws-actions/configure-aws-credentials from 4.1.0 to 4.2.1

Bumps [aws-actions/configure-aws-credentials](https://github.com/aws-actions/configure-aws-credentials) from 4.1.0 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@ececac1...b475783)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/release.yml

@@ -99,7 +99,7 @@ jobs:
         run: |
           zip -j "${ZIP_FILE}" ./bootstrap
 
-      - uses: aws-actions/configure-aws-credentials@ececac1a45f3b08a01d2dd070d28d111c5fe6722 # v4.1.0
+      - uses: aws-actions/configure-aws-credentials@b47578312673ae6fa5b5096b330d9fbac3d116df # v4.2.1
         with:
           role-to-assume: arn:aws:iam::197730964718:role/elastic-docs-v3-link-index-updater-deployer
           aws-region: us-east-2