Update CODEOWNERS to Platform Engineering team

[dottxado]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added/updated (for bug fixes/features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Development tooling

What is the current behavior? (You can also link to an open issue here)

What is the new behavior (if this is a feature change)?

Platform Team takes the ownership.

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No

Other information

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.15%. Comparing base (3b30fb2) to head (c829064).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #72   +/-   ##
=========================================
  Coverage     88.15%   88.15%           
  Complexity      343      343           
=========================================
  Files            27       27           
  Lines           979      979           
=========================================
  Hits            863      863           
  Misses          116      116           

Flag	Coverage Δ
unittests	88.15% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.