[Dúvida] Forbidden para comentar

No meu github, durante a execução da criação do comentário no github apareceu o seguinte erro:

Error: Error: Forbidden
    at file:///home/runner/work/github-actions/github-actions/scripts/pullRequestPreview.js:45:13
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Todo o restante do código aparenta funcionar corretamente, porém parece que meu GITHUB_TOKEN não tem permissões para adicionar um comentário no pull-request, mas eu não sei onde eu posso arrumar essas configurações.

Segue o código relacionado a aula:

ci.yml

name: "CI (Integração Contínua): Main Workflow"

env:
    # Necessario gerar um token na vercel
    VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
    VERCEL_ORG_ID: ${{ secrets.ORG_ID }}
    VERCEL_PROJECT_ID: ${{ secrets.PROJECT_ID }}
    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }}
on: 
    pull_request:
        branches: [ "main" ]

jobs:
    linter:
        runs-on: "ubuntu-latest"

        steps: 
            - uses: actions/checkout@v3
            
            # Roda a instalação das dependências do projeto
            - name: Run Installation
              run: npm install
            # Roda um comando simples usando o shell de execução
            - name: Run Linter
              run: npm run lint
    preview:
        runs-on: "ubuntu-latest"
        steps: 
            - uses: actions/checkout@v3
            # Roda a instalação das dependências do projeto
            - name: Run Installation
              run: npm install
            # Roda um comando simples usando o shell de execução, o comando gera um preview do site fora de produção com o deploy:staging
            - name: Run Preview Deployment
              run: npm run deploy:preview

pullRequestPreview

import { execSync } from "child_process";

console.log("[DEPLOY_PREVIEW]: START");
const command = "npm run deploy:staging ";
const output = execSync(command, { encoding: "utf-8" });
const outputLines = output.split("\n");
const DEPLOY_URl = outputLines[outputLines.length - 1];
console.log("[DEPLOY_PREVIEW]: END");

console.log(`You can see the deploly preview on: ${DEPLOY_URl}`);

console.log("[GITHUB_COMMENT]: START");

const { GITHUB_TOKEN, GITHUB_REPOSITORY, GITHUB_PR_NUMBER} = process.env;
console.log("GITHUB_REPOSITORY", GITHUB_REPOSITORY);
console.log("GITHUB_PR_NUMBER", GITHUB_PR_NUMBER);


//HEADER da requisição
const defaultHeaders = {};
defaultHeaders["authorization"] = `token ${GITHUB_TOKEN}`;
defaultHeaders["accept"] =
  "application/vnd.github.v3+json; application/vnd.github.antiope-preview+json";
defaultHeaders["content-type"] = "application/json";

const GH_COMMENT = `
- Deploy URL: [${DEPLOY_URl}](${DEPLOY_URl})
`;
fetch(
    `https://api.github.com/repos/${GITHUB_REPOSITORY}/issues/${GITHUB_PR_NUMBER}/comments`,
    {
      headers: defaultHeaders,
      method: "POST",
      body: JSON.stringify({
        body: GH_COMMENT,
      }),
    }
  )
    .then((response) => {
      if (response.ok) return response.json();
      throw new Error(response.statusText);
    })
    .catch((err) => {
      console.log("[COMMENT_ON_GITHUB: ERROR]");
      throw new Error(err);
    })
    .finally(() => {
      console.log("[COMMENT_ON_GITHUB: END]");
    });

Relátorio do action "preview"

Run npm run deploy:preview

> deploy:preview
> node ./scripts/pullRequestPreview.js

[DEPLOY_PREVIEW]: START
Vercel CLI 37.2.1
[DEPLOY_PREVIEW]: END
WARN! `--confirm` is deprecated, please use `--yes` instead
You can see the deploly preview on: https://projeto-curso-ga-teste-nrdpl5pby-henry-kanemotos-projects.vercel.app
The "--no-clipboard" option was ignored because it is the default behavior. Please remove it.
Retrieving project…
Deploying henrykanemoto/projeto-curso-ga-teste
Uploading [--------------------] (0.0B/4.3KB)
Uploading [=====---------------] (1.1KB/4.3KB)
Uploading [==========----------] (2.3KB/4.3KB)
Uploading [====================] (4.3KB/4.3KB)
Inspect: https://vercel.com/henry-kanemotos-projects/projeto-curso-ga-teste/AzPh9AvKWY3dTiRHba1Vxdb7gUsA [2s]
Preview: https://projeto-curso-ga-teste-nrdpl5pby-henry-kanemotos-projects.vercel.app [2s]
Queued
Building
Completing
To deploy to production (projeto-curso-ga-teste-eight.vercel.app), run `vercel --prod`
[GITHUB_COMMENT]: START
GITHUB_REPOSITORY HenryKanemoto/github-actions
GITHUB_PR_NUMBER 5
[COMMENT_ON_GITHUB: ERROR]
[COMMENT_ON_GITHUB: END]
file:///home/runner/work/github-actions/github-actions/scripts/pullRequestPreview.js:45
      throw new Error(err);
            ^

Error: Error: Forbidden
    at file:///home/runner/work/github-actions/github-actions/scripts/pullRequestPreview.js:45:13
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)