Bump @slack/web-api from 5.10.0 to 5.11.0

Bumps [@slack/web-api](https://github.com/slackapi/node-slack-sdk) from 5.10.0 to 5.11.0.
- [Release notes](https://github.com/slackapi/node-slack-sdk/releases)
- [Commits](https://github.com/slackapi/node-slack-sdk/compare/@slack/web-api@5.10.0...@slack/web-api@5.11.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -14,7 +14,7 @@
     "license": "MIT",
     "dependencies": {
         "@actions/core": "^1.2.4",
-        "@slack/web-api": "^5.10.0"
+        "@slack/web-api": "^5.11.0"
     },
     "devDependencies": {
         "@types/node": "^14.0.23",