Bump dotenv from 16.4.2 to 16.4.4 in /graph-sample

Bumps [dotenv](https://github.com/motdotla/dotenv) from 16.4.2 to 16.4.4.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v16.4.2...v16.4.4)

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

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

Author: dependabot[bot]

graph-sample/package-lock.json

@@ -15,7 +15,7 @@
     "date-fns": "^2.30.0",
     "date-fns-tz": "^2.0.0",
     "debug": "^4.3.4",
-    "dotenv": "^16.4.2",
+    "dotenv": "^16.4.4",
     "express": "^4.18.2",
     "express-promise-router": "^4.1.1",
     "express-session": "^1.18.0",