chore(deps): update container image ghcr.io/coder/code-server to v4.9.0

[renovate]

This PR contains the following updates:

Package	Update	Change
ghcr.io/coder/code-server	minor	4.8.3 -> 4.9.0

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This PR has been generated by Mend Renovate. View repository job log here.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ COPYPASTE	jscpd	yes		no	1.37s
✅ KUBERNETES	kubeval	1		0	0.21s
✅ REPOSITORY	git_diff	yes		no	0.02s
✅ REPOSITORY	secretlint	yes		no	1.86s
✅ YAML	prettier	1		0	0.65s
✅ YAML	yamllint	1		0	0.31s

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