Mechanical reformat of .github/workflows

[vorburger]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

Related to #2232

Description

This is a mechanical reformat of the x2 YAML in .github/workflows.

It was done by https://marketplace.visualstudio.com/items?itemName=GitHub.vscode-github-actions.

This makes future changes easier to review.

Type Choose one: Builds

Checklist

• [X] I have read and acknowledged the Code of conduct.
• [X] I have read the Contributing page.
• [X] I have signed the Google Individual CLA, or I am covered by my company's Corporate CLA.
• [X] I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
• [ ] I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project.
• [ ] I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally.
• [ ] I have built and run the demo app(s) to verify my change fixes the issue and/or does not break the demo app(s).

[vorburger]

@santosh-pingle @jingtang10 do you want me to "self merge" this (and future related) changes, or do you want to review?