fix(helm): update chart ingress-nginx to 4.8.1

[renovate]

This PR contains the following updates:

Package	Update	Change
ingress-nginx	patch	4.8.0 -> 4.8.1

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Release Notes

kubernetes/ingress-nginx (ingress-nginx)

v4.8.1

Ingress controller for Kubernetes using NGINX as a reverse proxy and load balancer

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[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ REPOSITORY	git_diff	yes		no	0.02s
✅ REPOSITORY	secretlint	yes		no	34.1s
✅ YAML	prettier	1		0	0.6s
✅ YAML	yamllint	1		0	0.28s

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