build(deps): bump slack-bolt from 1.27.0 to 1.28.0 (#68)

Bumps [slack-bolt](https://github.com/slackapi/bolt-python) from 1.27.0 to 1.28.0.
- [Release notes](https://github.com/slackapi/bolt-python/releases)
- [Commits](slackapi/bolt-python@v1.27.0...v1.28.0)

---
updated-dependencies:
- dependency-name: slack-bolt
  dependency-version: 1.28.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 requires-python = ">=3.9"
 dependencies = [
     "slack-sdk==3.41.0",
-    "slack-bolt==1.27.0",
+    "slack-bolt==1.28.0",
     "slack-cli-hooks<1.0.0",
     "openai==2.30.0",
     "python-dotenv==1.2.1",

requirements.txt

@@ -1,5 +1,5 @@
 slack-sdk==3.41.0
-slack-bolt==1.27.0
+slack-bolt==1.28.0
 slack-cli-hooks<1.0.0
 
 # If you use a different LLM vendor, replace this dependency