MergeRequestDiscussions.create Request-URI Too Large

Description

Node.js version: v18.16.0
Gitbeaker version: 39.21.2
Gitbeaker release (cli, node, browser, core, requester-utils): node
OS & version: macOS Sonoma 14.0

The following API usage results in an Request-URI Too Large error:

MergeRequestDiscussions.create(projectId, mergeRequestId, body);
// Error: Request-URI Too Large
//     at throwFailedRequestError ([...]/@gitbeaker/rest/dist/index.js:75:9)

Steps to reproduce

Create a Gitlab API instance with the host set to https://gitlab.com/api and a valid API token
Call MergeRequestDiscussions.create with a body of containing more than 10000 characters
See error

Expected behaviour

To have not resulted in an error, since the character limit seems to be way higher than 10k (I can manually place a comment with 610k characters).

Actual behaviour

An Request-URI Too Large error

Possible fixes

The request sent to Gitlab's REST API seems to append the body as a URI parameter, instead of sending it as an actual JSON body. Rewriting my code using the fetch API fixes this issue for me:

async createMergeRequestDiscussion(projectId: string, mergeRequestId: number, body: string) {
    await fetch(path.join(this.api.url, `/projects/${projectId}/merge_requests/${mergeRequestId}/discussions`), {
        method: 'POST',
        headers: {
            'PRIVATE-TOKEN': process.env.GITLAB_TOKEN!!,
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({body})
    });
}

Checklist

[X] I have checked that this is not a duplicate issue.
[X] I have read the documentation.

jdalrymple / gitbeaker

MergeRequestDiscussions.create Request-URI Too Large #3478