Add contributors section

[unixorn]

• Add a contributors lineup image.
• opensource.org changed the location of the license summaries and helpfully didn't provide a redirect, so update that link
• We use awesomebot for link checking, disable MARKDOWN_MARKDOWN_LINK_CHECK in MegaLinter

[github-actions[bot]]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	1		0	0.0s
✅ COPYPASTE	jscpd	yes		no	0.95s
✅ MARKDOWN	markdownlint	1		0	0.38s
✅ MARKDOWN	markdown-table-formatter	1		0	0.22s
✅ REPOSITORY	checkov	yes		no	8.81s
✅ REPOSITORY	devskim	yes		no	0.62s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	gitleaks	yes		no	0.11s
✅ REPOSITORY	git_diff	yes		no	0.0s
✅ REPOSITORY	secretlint	yes		no	0.92s
✅ REPOSITORY	syft	yes		no	0.48s
✅ REPOSITORY	trivy	yes		no	3.78s
✅ SPELL	misspell	2		0	0.05s
✅ YAML	prettier	1		0	0.4s
✅ YAML	v8r	1		0	2.24s

See detailed report in MegaLinter reports _Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff_

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