Bump @azure/msal-node from 2.6.0 to 2.6.1 in /graph-sample

Bumps [@azure/msal-node](https://github.com/AzureAD/microsoft-authentication-library-for-js) from 2.6.0 to 2.6.1.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-js/releases)
- [Commits](AzureAD/microsoft-authentication-library-for-js@msal-node-v2.6.0...msal-node-v2.6.1)

---
updated-dependencies:
- dependency-name: "@azure/msal-node"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

graph-sample/package-lock.json

@@ -8,7 +8,7 @@
     "build": "npx tsc"
   },
   "dependencies": {
-    "@azure/msal-node": "^2.6.0",
+    "@azure/msal-node": "^2.6.1",
     "@microsoft/microsoft-graph-client": "^3.0.7",
     "connect-flash": "^0.1.1",
     "cookie-parser": "~1.4.4",