build(deps): bump @slack/web-api from 7.5.0 to 7.6.0

Bumps [@slack/web-api](https://github.com/slackapi/node-slack-sdk) from 7.5.0 to 7.6.0.
- [Release notes](https://github.com/slackapi/node-slack-sdk/releases)
- [Commits](https://github.com/slackapi/node-slack-sdk/compare/@slack/web-api@7.5.0...@slack/web-api@7.6.0)

---
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>

package.json

@@ -15,7 +15,7 @@
     "dependencies": {
         "@actions/core": "^1.11.1",
         "@actions/glob": "^0.5.0",
-        "@slack/web-api": "^7.5.0"
+        "@slack/web-api": "^7.6.0"
     },
     "devDependencies": {
         "@types/node": "^20.14.12",