plugin/sdk/testing/acceptance-testing: Update action major versions

[bflad]

What

Update example GitHub Action workflow contents to match latest dependencies.

Why

Reference: https://github.com/actions/checkout/tags
Reference: https://github.com/actions/setup-go/tags
Reference: https://github.com/hashicorp/setup-terraform/tags

This will prevent immediate update notifications for provider developers copying this content and using dependabot for GitHub Actions dependency management.

Screenshots

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Merge Checklist

If items do not apply to your changes, add (N/A) and mark them as complete.

Pull Request

• One or more labels describe the type of change (e.g. clarification) and associated product (e.g. tfc).
• Description links to related pull requests or issues, if any.

Content

• Redirects have been added for moved, renamed, or deleted pages.
• Sidebar navigation files have been updated for added, deleted, reordered, or renamed pages.
• Links to related content where appropriate (e.g., API endpoints, permissions, etc.).
• Pages with related content are updated and link to this content when appropriate.
• New pages have metadata (page name and description) at the top.
• New images are 2048 px wide. They have HashiCorp standard annotation color (#F92672) and format (rectangle with rounded corners), blurred sensitive details (e.g. credentials, usernames, user icons), and descriptive alt text in the markdown for accessibility.
• New code blocks have the correct syntax and line breaks to eliminate horizontal scroll bars.
• UI elements (button names, page names, etc.) are bolded.
• The Vercel website preview successfully deployed.

Reviews

• I or someone else reviewed the content for technical accuracy.
• I or someone else reviewed the content for typos, punctuation, spelling, and grammar.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
terraform-website	✅ Ready (Inspect)	Visit Preview	May 2, 2022 at 4:44PM (UTC)

[bflad]

I will recreate this pull request in terraform-plugin-sdk once the content has been migrated. 👍