Bump express-validator from 7.1.0 to 7.2.0 in /graph-sample

Bumps [express-validator](https://github.com/express-validator/express-validator) from 7.1.0 to 7.2.0.
- [Release notes](https://github.com/express-validator/express-validator/releases)
- [Commits](express-validator/express-validator@v7.1.0...v7.2.0)

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

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

Author: dependabot[bot]

graph-sample/package-lock.json

@@ -19,7 +19,7 @@
     "express": "^4.19.2",
     "express-promise-router": "^4.1.1",
     "express-session": "^1.18.0",
-    "express-validator": "^7.1.0",
+    "express-validator": "^7.2.0",
     "hbs": "^4.2.0",
     "http-errors": "^2.0.0",
     "isomorphic-fetch": "^3.0.0",