Bump dotenv from 16.3.1 to 16.4.4

Bumps [dotenv](https://github.com/motdotla/dotenv) from 16.3.1 to 16.4.4.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v16.3.1...v16.4.4)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -6,7 +6,7 @@
     "dependencies": {
         "@slack/bolt": "^3.15.0",
         "body-parser": "^1.20.2",
-        "dotenv": "^16.3.1",
+        "dotenv": "^16.4.4",
         "https-proxy-agent": "^7.0.2",
         "pg": "^8.11.3",
         "request": "^2.88.2"