Bump @tony.ganchev/eslint-plugin-header in /user-auth/graphtutorial

Bumps [@tony.ganchev/eslint-plugin-header](https://github.com/tonyganchev/eslint-plugin-header) from 3.2.4 to 3.2.6.
- [Release notes](https://github.com/tonyganchev/eslint-plugin-header/releases)
- [Changelog](https://github.com/tonyganchev/eslint-plugin-header/blob/main/CHANGELOG.md)
- [Commits](tonyganchev/eslint-plugin-header@v3.2.4...v3.2.6)

---
updated-dependencies:
- dependency-name: "@tony.ganchev/eslint-plugin-header"
  dependency-version: 3.2.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

user-auth/graphtutorial/package-lock.json

@@ -14,7 +14,7 @@
   "license": "MIT",
   "devDependencies": {
     "@microsoft/microsoft-graph-types": "^2.43.1",
-    "@tony.ganchev/eslint-plugin-header": "^3.2.4",
+    "@tony.ganchev/eslint-plugin-header": "^3.2.6",
     "@types/isomorphic-fetch": "^0.0.39",
     "@types/node": "^25.3.3",
     "@types/readline-sync": "^1.4.8",