Add Udayraj123 to maintainers.yml

[Udayraj123]

Please confirm this pull request meets the following requirements:

• I followed the contributing guidelines: https://github.com/github/india/blob/main/CONTRIBUTING.md.

Which change are you proposing?

• Adding/updating open source project/s
• Adding/updating maintainer/s

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Adding/updating maintainer/s

• Maintainer's location on their GitHub profile indicates as India
• Maintainer has approved this PR to be included on the website (self)

What open source project/s does the individual maintain?

• https://github.com/Udayraj123/OMRChecker/

relates to #1070

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Please note: we will close your PR without comment if you do not check the boxes above and provide ALL requested information.