build(deps): bump @slack/bolt from 4.7.2 to 4.7.3 (#32)

Bumps [@slack/bolt](https://github.com/slackapi/bolt-js) from 4.7.2 to 4.7.3.
- [Release notes](https://github.com/slackapi/bolt-js/releases)
- [Changelog](https://github.com/slackapi/bolt-js/blob/main/CHANGELOG.md)
- [Commits](slackapi/bolt-js@v4.7.2...v4.7.3)

---
updated-dependencies:
- dependency-name: "@slack/bolt"
  dependency-version: 4.7.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -9,6 +9,6 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@slack/bolt": "^4.7.2"
+    "@slack/bolt": "^4.7.3"
   }
 }