chore(deps): bump @slack/bolt from 3.22.0 to 4.2.0

Bumps [@slack/bolt](https://github.com/slackapi/bolt-js) from 3.22.0 to 4.2.0.
- [Release notes](https://github.com/slackapi/bolt-js/releases)
- [Commits](https://github.com/slackapi/bolt-js/compare/@slack/[email protected]...@slack/[email protected])

---
updated-dependencies:
- dependency-name: "@slack/bolt"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -28,7 +28,7 @@
   "homepage": "https://github.com/ucsf-ckm/zorgbort#README.md",
   "dependencies": {
     "@octokit/rest": "^20.1.0",
-    "@slack/bolt": "^3.21.4"
+    "@slack/bolt": "^4.2.0"
   },
   "devDependencies": {
     "eslint": "^9.14.0",