Deprecation warnings in GitHub workflows

[michaelnchin]

Recent runs of our automated GitHub actions for ECR deployments and unit tests have some deprecation warnings requiring updates to imported actions. These are to do with the campaigns for:

1. NodeJS 12 -> 16: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/
2. set-output command removal: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

In build_docker.yml:

• For actions: tyankatsu0105/read-package-version-actions@v1, aws-actions/configure-aws-credentials@v1
• Example run: https://github.com/aws/graph-explorer/actions/runs/5767952199

In unit.yml:

• For actions: codecov/codecov-action@v2
• Example run: https://github.com/aws/graph-explorer/actions/runs/5764302151