[Schema Inaccuracy] allowed_merge_methods missing in repository-rule-pull-request

[JoshuaKGoldberg]

Schema Inaccuracy

"POST /repos/{owner}/{repo}/rulesets"'s rules > { type: "pull-request" }'s parameters define what can be given for the PR rule parameters in a ruleset. They're documented on https://docs.github.com/en/rest/repos/rules?apiVersion=2022-11-28#create-a-repository-ruleset--fine-grained-access-tokens.

Expanding Body Parameters > rules > pull_request shows allowed_merge_methods as the first property:

allowed_merge_methods array of strings
When merging pull requests, you can allow any combination of merge commits, squashing, or rebasing. At least one option must be enabled.

Expected

This should be allowed in the Rest API types, right?

Reproduction Steps

In short, https://github.com/JoshuaKGoldberg/repros/blob/github-rulesets-post-api-allowed_merge_methods/index.ts:

gh pr checkout https://github.com/JoshuaKGoldberg/repros --branch github-rulesets-post-api-allowed_merge_methods
cd repros
npm i
npm run tsc

index.ts:21:9 - error TS2353: Object literal may only specify known properties, and 'allowed_merge_methods' does not exist in type '{ dismiss_stale_reviews_on_push: boolean; require_code_owner_review: boolean; require_last_push_approval: boolean; required_approving_review_count: number; required_review_thread_resolution: boolean; }'.

21         allowed_merge_methods: ["squash"],
           ~~~~~~~~~~~~~~~~~~~~~