[dependabot:actions] bump citizensadvice/build-and-private-ecr-push-action

Bumps [citizensadvice/build-and-private-ecr-push-action](https://github.com/citizensadvice/build-and-private-ecr-push-action) from 4 to 6.
- [Release notes](https://github.com/citizensadvice/build-and-private-ecr-push-action/releases)
- [Commits](citizensadvice/build-and-private-ecr-push-action@ac3a0c4...c371b65)

---
updated-dependencies:
- dependency-name: citizensadvice/build-and-private-ecr-push-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/dev_deploy.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       - name: Build and push to ECR
-        uses: citizensadvice/build-and-private-ecr-push-action@ac3a0c4db0275ee5976e3cd41a9ab124a2f880ce
+        uses: citizensadvice/build-and-private-ecr-push-action@c371b653f4ecccfbec4e46e3580130da7c425918
         with:
           role_arn: "arn:aws:iam::979633842206:role/LocalOfficeSearchApiDeployment"
           dockerfile_context: "."