Update sous-chefs/.github action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
sous-chefs/.github	action	major	5.0.8 → 6.0.0

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Release Notes

sous-chefs/.github (sous-chefs/.github)

v6.0.0

Compare Source

What's Changed

• fix: convert release body to Slack mrkdwn in notifier by @​damacus in #​66
• chore(deps): update davidanson/markdownlint-cli2-action action to v23 by @​renovate[bot] in #​65

Full Changelog: sous-chefs/.github@5.1.0...6.0.0

v5.1.0

Compare Source

What's Changed

• docs: Document release process by @​damacus in #​50
• chore(deps): update actions (major) by @​renovate[bot] in #​51
• chore(deps): update actions (major) by @​renovate[bot] in #​52
• feat: replace actionshub/chef-install with Cinc Workstation by @​damacus in #​54
• chore(deps): update damacus/check-chef-metadata-action action to v3 by @​renovate[bot] in #​53
• docs: add test coverage analysis with proposed improvements by @​damacus in #​55
• chore: automate profile README updates with weekly workflow by @​damacus in #​56
• chore(deps): update actions (major) by @​renovate[bot] in #​57
• feat: Update workflow by @​damacus in #​58
• feat: optimize lint-unit workflow with ruby/setup-ruby by @​damacus in #​61
• fix: optimize lint-unit workflow with bundler and chefspec pin by @​damacus in #​62
• chore: use ubuntu-slim for lightweight release jobs by @​damacus in #​63
• fix: pin workflow ruby to chef workstation by @​damacus in #​64

Full Changelog: sous-chefs/.github@5.0.8...5.1.0

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