Update contributing file reference

[emmanuel-ferdman]

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

Fixes #[issue number]

Description Small PR. Commit faea544941d78250b8607f57ddd6d52a95baf5fe moved the location of the contributing file. This PR adjusts sources to changes.

Alternative(s) considered

Type Documentation

Screenshots (if applicable)

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.
• [x] I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project.
• [x] I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally.
• [x] 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).

[emmanuel-ferdman]

@jingtang10 thanks for review. Removed the Feedback and getting help section as requested