Fix #11477: Update codeowners in preparation for vacation. (#11810)
Fix #11477: Update codeowners in preparation for vacation. (#11810)

* Update codeowners in preparation for vacation.

* Update TODO issue number

* Address comments.
oppia/oppia,oppia/oppia,brianrodri/oppia,kevinlee12/oppia,oppia/oppia,brianrodri/oppia,oppia/oppia,brianrodri/oppia,oppia/oppia,kevinlee12/oppia,kevinlee12/oppia,brianrodri/oppia,kevinlee12/oppia,brianrodri/oppia,kevinlee12/oppia