fix: buildspec secret names

[luislhl]

Motivation

We were getting an error during deploy in CodeBuild because of wrong secret names

Acceptance Criteria

• The secret names should be fixed and the deploy should run

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged
• Make sure either the unit tests and/or the QA tests are capable of testing the new features
• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.