Bump @slack/web-api from 6.9.1 to 6.11.1 (#277)

Bumps [@slack/web-api](https://github.com/slackapi/node-slack-sdk) from 6.9.1 to 6.11.1.
- [Release notes](https://github.com/slackapi/node-slack-sdk/releases)
- [Commits](https://github.com/slackapi/node-slack-sdk/compare/@slack/web-api@6.9.1...@slack/web-api@6.11.1)

---
updated-dependencies:
- dependency-name: "@slack/web-api"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -33,7 +33,7 @@
   "dependencies": {
     "@actions/core": "^1.10.1",
     "@actions/github": "^6.0.0",
-    "@slack/web-api": "^6.9.1",
+    "@slack/web-api": "^6.11.1",
     "axios": "^1.5.1",
     "flat": "^5.0.2",
     "https-proxy-agent": "^7.0.2",