Correction of GitHub username in MAINTAINERS.MD

[hdamker]

What type of PR is this?

Add one of the following kinds:

• correction
• subproject management

What this PR does / why we need it:

The Github username of Deepak Gunjal in the MAINTAINERS.md was obviously wrong.

Which issue(s) this PR fixes:

Fixes #na / minor fix

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	2		0	0.03s
✅ JSON	eslint-plugin-jsonc	1	0	0	1.46s
✅ JSON	jsonlint	1		0	0.17s
✅ JSON	prettier	1	1	0	0.85s
✅ JSON	v8r	1		0	2.02s
✅ OPENAPI	spectral	3		0	6.1s
✅ REPOSITORY	git_diff	yes		no	0.54s
✅ REPOSITORY	secretlint	yes		no	4.61s
✅ YAML	yamllint	3		0	0.66s

See detailed report in MegaLinter reports

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[hdamker]

Could please one of @camaraproject/edge-cloud_codeowners shortly check this PR and approve it? Thanks.