Update CODEOWNERS

[cnlangzi]

Changes

• added @cnlangzi as codeowner

Fixes

Tests

Tasks to complete before merging PR:

• Ensure system tests are passing. If not Run them manually to check for any regressions 📋
• Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #915 (239cf72) into staging (bc43ec4) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff            @@
##           staging     #915   +/-   ##
========================================
  Coverage    26.46%   26.46%           
========================================
  Files           77       77           
  Lines         7867     7867           
========================================
  Hits          2082     2082           
  Misses        5513     5513           
  Partials       272      272           

Flag	Coverage Δ
Unit-Tests	26.46% <ø> (ø)

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