chore(deps): update dependency norwoodj/helm-docs to v1.8.1

This MR contains the following updates:

Package	Update	Change
norwoodj/helm-docs	minor	v1.7.0 -> v1.8.1

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Release Notes

norwoodj/helm-docs

v1.8.1

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Changelog

• e91c4c3 Don't print angle brackets for URL/email if not present

v1.8.0

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Changelog

• 18004fe Add option for a values file named other than values.yaml.
• 98700d9 Avoid raw URLs in maintainer tables
• 372c61e Merge branch 'master' into badge-style
• 381fc93 Merge pull request #​102 from dfarrell07/no_raw_url
• 6754e5a Merge pull request #​121 from dirien/badge-style
• 76c2280 Merge pull request #​130 from maybolt/values-file-option-argument
• 113c8ed Merge pull request #​132 from norwoodj/jnorwood/fix/131
• ca7f709 Updgrades golang/x/sys to fix #​131
• 7b58ea4 Updgrades sprig to v3
• fa0ab6f feat: make the badge style from shields.io configurable

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merged