Update maintainers list

[VijayanB]

Description

Include Vacha Shah to maintainers list after got approval from other maintainers.

Issues Resolved

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass
• [ ] New functionality has been documented.
  • [ ] New functionality has documentation added
• [ ] Commits are signed as per the DCO using --signoff

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[VijayanB]

Failures are not related to this PR