260 update and review codeowners and maintainersmd file

[hdamker]

What type of PR is this?

• subproject management

What this PR does / why we need it:

See #260

Which issue(s) this PR fixes:

Fixes #260

Special notes for reviewers:

@FredericFi need to accept the invite into the CAMARA GitHub organisation

[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	1.33s
✅ JSON	jsonlint	1		0	0.18s
✅ JSON	prettier	1	1	0	0.97s
✅ JSON	v8r	1		0	2.15s
✅ OPENAPI	spectral	2		0	4.68s
✅ REPOSITORY	git_diff	yes		no	0.54s
✅ REPOSITORY	secretlint	yes		no	4.48s
✅ YAML	yamllint	2		0	0.67s

See detailed report in MegaLinter reports

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