Problem with GitHub workflow that automatically adds a "no changelog" label

The following error has been happening for pull requests that match the patterns below.

To reproduce this error, create a pull request to main that has "Minor" in the title.

Run actions/github-script@v7
  with:
    github-token: ***
    script: // Regular expression to match the PR title pattern "Bump * from * to *"
  const bumpPattern = /^Bump .* from .* to .*/;
  
  // Fetch the PR
  const { data: pullRequest } = await github.rest.pulls.get({
    owner: context.repo.owner,
    repo: context.repo.repo,
    pull_number: context.issue.number,
  });
  
  if (
    pullRequest.title.includes('autoupdate') ||
    pullRequest.title.includes('Minor') ||
    pullRequest.title.includes('Fix typo') ||
    pullRequest.title.includes('Update changelog entries') ||
    pullRequest.title.includes('Update changelog prior to') ||
    pullRequest.title.includes('Update pinned requirements') ||
    pullRequest.title.includes('Update release checklist') ||
    bumpPattern.test(pullRequest.title)
  ) {
    // If yes, then apply the label "no changelog entry needed"
    await github.rest.issues.addLabels({
      owner: context.repo.owner,
      repo: context.repo.repo,
      issue_number: context.issue.number,
      labels: ['no changelog entry needed'],
    });
  }
  
    debug: false
    user-agent: actions/github-script
    result-encoding: json
    retries: 0
    retry-exempt-status-codes: 400,401,403,404,422
  env:
    CHANGELOG_INSTRUCTIONS: ⚠️ Please add a changelog entry at `changelog/NUMBER.TYPE.rst`, where `NUMBER` is the pull request number and `TYPE` is one of `feature`, `trivial`, `doc`, `internal`, `bugfix`, `breaking`, or `removal`.
  
  Minor change such as typo fixes and hyperlink updates do not need a changelog entry.
  
  For details, see: https://docs.plasmapy.org/en/latest/contributing/changelog_guide.html#adding-a-changelog-entry
RequestError [HttpError]: Resource not accessible by integration
Error: Unhandled error: HttpError: Resource not accessible by integration
    at /home/runner/work/_actions/actions/github-script/v7/dist/index.js:9537:21
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async eval (eval at callAsyncFunction (/home/runner/work/_actions/actions/github-script/v7/dist/index.js:35424:16), <anonymous>:24:3)
    at async main (/home/runner/work/_actions/actions/github-script/v7/dist/index.js:35522:20) {
  status: 403,
  response: {
    url: 'https://api.github.com/repos/PlasmaPy/PlasmaPy/issues/2759/labels',
    status: 403,
    headers: {
      'access-control-allow-origin': '*',
      'access-control-expose-headers': 'ETag, Link, Location, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Used, X-RateLimit-Resource, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval, X-GitHub-Media-Type, X-GitHub-SSO, X-GitHub-Request-Id, Deprecation, Sunset',
      'content-encoding': 'gzip',
      'content-security-policy': "default-src 'none'",
      'content-type': 'application/json; charset=utf-8',
      date: 'Sat, 13 Jul 2024 01:14:54 GMT',
      'referrer-policy': 'origin-when-cross-origin, strict-origin-when-cross-origin',
      server: 'github.com',
      'strict-transport-security': 'max-age=31536000; includeSubdomains; preload',
      'transfer-encoding': 'chunked',
      vary: 'Accept-Encoding, Accept, X-Requested-With',
      'x-accepted-github-permissions': 'issues=write; pull_requests=write',
      'x-content-type-options': 'nosniff',
      'x-frame-options': 'deny',
      'x-github-api-version-selected': '2022-11-28',
      'x-github-media-type': 'github.v3; format=json',
      'x-github-request-id': '9441:13E02E:98A7D6:11065FC:6691D50E',
      'x-ratelimit-limit': '5000',
      'x-ratelimit-remaining': '4940',
      'x-ratelimit-reset': '1720834470',
      'x-ratelimit-resource': 'core',
      'x-ratelimit-used': '60',
      'x-xss-protection': '0'
    },
    data: {
      message: 'Resource not accessible by integration',
      documentation_url: 'https://docs.github.com/rest/issues/labels#add-labels-to-an-issue',
      status: '403'
    }
  },
  request: {
    method: 'POST',
    url: 'https://api.github.com/repos/PlasmaPy/PlasmaPy/issues/2759/labels',
    headers: {
      accept: 'application/vnd.github.v3+json',
      'user-agent': 'actions/github-script octokit-core.js/5.0.1 Node.js/20.13.1 (linux; x64)',
      authorization: 'token [REDACTED]',
      'content-type': 'application/json; charset=utf-8'
    },
    body: '{"labels":["no changelog entry needed"]}',
    request: {
      agent: [Agent],
      fetch: [Function: proxyFetch],
      hook: [Function: bound bound register]
    }
  }
}

Start with the GitHub workflow containing actions/github-script@v7 and reproduce the failure using a pull request titled "Minor". Trace the addLabels request and its 403 response, then verify that matching pull requests receive the "no changelog entry needed" label without an unhandled error.