feat(repo-rulesets): add support for required reviewers in org and repo rs

[vperfilyev-vitech]

…on and repository rulesets

Resolves #3081

---

Before the change?

The pull_request rule in organization and repository rulesets did not support the required_reviewers field
Users could not configure specific teams to review changes to particular file patterns through Terraform
The "Required review by specific teams" feature (announced November 2025) was not available in the provider

After the change?

• Added required_reviewers block to the pull_request rule for both github_organization_ruleset and github_repository_ruleset resources

• Users can now specify teams that must approve changes to specific file patterns

• Supports configuring:

  1. reviewer block with id (team ID) and type (currently only "Team" supported)
  2. file_patterns - list of fnmatch patterns (e.g., [".go", ".tf"])
  3. minimum_approvals - number of required approvals (0 = optional reviewer)

resource "github_repository_ruleset" "example" {
  name        = "example"
  repository  = github_repository.example.name
  target      = "branch"
  enforcement = "active"

  conditions {
    ref_name {
      include = ["~DEFAULT_BRANCH"]
      exclude = []
    }
  }

  rules {
    pull_request {
      required_approving_review_count = 1

      required_reviewers {
        reviewer {
          id   = github_team.security.id
          type = "Team"
        }
        file_patterns     = ["*.go", "security/**"]
        minimum_approvals = 2
      }
    }
  }
}

Pull request checklist

• Schema migrations have been created if needed (example)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

---

Additional Notes
This feature is currently in beta on GitHub's side and subject to change
Only Team reviewer type is supported (as per GitHub API)
Reference: GitHub Changelog - Required review by specific teams now available in rulesets

[github-actions]

👋 Hi! Thank you for this contribution! Just to let you know, our GitHub SDK team does a round of issue and PR reviews twice a week, every Monday and Friday! We have a process in place for prioritizing and responding to your input. Because you are a part of this community please feel free to comment, add to, or pick up any issues/PRs that are labeled with Status: Up for grabs. You & others like you are the reason all of this works! So thank you & happy coding! 🚀

[deiga]

@vperfilyev-vitech Thanks for creating this! Note that there is already a PR for this feature: #3073