Bump aws-actions/amazon-ecr-login in the all-deps group (#875)

Bumps the all-deps group with 1 update: [aws-actions/amazon-ecr-login](https://github.com/aws-actions/amazon-ecr-login).


Updates `aws-actions/amazon-ecr-login` from 2.1.5 to 2.1.6
- [Release notes](https://github.com/aws-actions/amazon-ecr-login/releases)
- [Changelog](https://github.com/aws-actions/amazon-ecr-login/blob/main/CHANGELOG.md)
- [Commits](aws-actions/amazon-ecr-login@fa648b4...d539f09)

---
updated-dependencies:
- dependency-name: aws-actions/amazon-ecr-login
  dependency-version: 2.1.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-deps
...

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Author: dependabot[bot]

.github/workflows/aws_conformance_ci.yml

@@ -42,7 +42,7 @@ jobs:
       # Authenticate with ECR to push the conformance and hammer images.
       - name: Login to Amazon ECR
         id: login-ecr
-        uses: aws-actions/amazon-ecr-login@fa648b43de3d4d023bcb3f89ed6940096949c419 # v2.1.5
+        uses: aws-actions/amazon-ecr-login@d539f0932e70871a027e9d5a9d8fc38589180a64 # v2.1.6
 
       # Build the conformance image and push it to ECR. This will be used later on by Terragrunt.
       - name: Build, tag, and push Conformance image to Amazon ECR