Add new MAINTAINERS to CODEOWNERS file

[bandinib-amzn]

Description

Adding Bandini to CODEOWNERS, this is follow up PR with #5113

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[codecov]

Codecov Report

Merging #5456 (292968c) into main (e0b6006) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5456      +/-   ##
==========================================
- Coverage   66.82%   66.82%   -0.01%     
==========================================
  Files        3291     3291              
  Lines       63174    63174              
  Branches    10055    10055              
==========================================
- Hits        42219    42213       -6     
+ Misses      18471    18452      -19     
- Partials     2484     2509      +25     

Flag	Coverage Δ
Linux_1	35.24% <ø> (ø)
Linux_2	55.28% <ø> (ø)
Linux_3	43.81% <ø> (+0.01%)	⬆️
Linux_4	35.34% <ø> (ø)
Windows_1	35.26% <ø> (-0.05%)	⬇️
Windows_2	55.25% <ø> (ø)
Windows_3	43.81% <ø> (?)
Windows_4	35.34% <ø> (ø)

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

see 21 files with indirect coverage changes

[joshuarrrr]

@opensearch-project/admin Can you provide @bandinib-amzn with maintainer access?