Add permissions for issues in workflow config

[seilorjunior]

The pipeline is giving error.
Run actions/github-script@v7 RequestError [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) { status: 403, response: { url: 'https://api.github.com/repos/Azure-Samples/AI-Gateway/issues/285/comments', 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: 'Wed, 18 Feb 2026 18:57:28 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': '63C1:321231:6E8E3F1:1E0F67D0:69960B98', 'x-ratelimit-limit': '15000', 'x-ratelimit-remaining': '14996', 'x-ratelimit-reset': '1771444646', 'x-ratelimit-resource': 'core', 'x-ratelimit-used': '4', 'x-xss-protection': '0' }, data: { message: 'Resource not accessible by integration', documentation_url: 'https://docs.github.com/rest/issues/comments#create-an-issue-comment', status: '403' } }, request: { method: 'POST', url: 'https://api.github.com/repos/Azure-Samples/AI-Gateway/issues/285/comments', headers: { accept: 'application/vnd.github.v3+json', 'user-agent': 'actions/github-script octokit-core.js/5.0.1 Node.js/20.19.6 (linux; x64)', authorization: 'token [REDACTED]', 'content-type': 'application/json; charset=utf-8' }, body: '{"body":"## 📋 Labs Config Preview\n\nThe following labs will be updated in docs/labs-config.json when this PR is merged:\n\n- backend-pool-load-balancing\n- backend-pool-load-balancing-tf\n\nThe config will be updated on both main and gh-pages branches."}', request: { agent: [Agent], fetch: [Function: proxyFetch], hook: [Function: bound bound register] } } }