Update larastan/larastan requirement from ^3.8.1 to ^3.9.6

Updates the requirements on [larastan/larastan](https://github.com/larastan/larastan) to permit the latest version.
- [Release notes](https://github.com/larastan/larastan/releases)
- [Changelog](https://github.com/larastan/larastan/blob/3.x/RELEASE.md)
- [Commits](larastan/larastan@v3.8.1...v3.9.6)

---
updated-dependencies:
- dependency-name: larastan/larastan
  dependency-version: 3.9.6
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -21,7 +21,7 @@
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.48",
-    "larastan/larastan": "^3.8.1",
+    "larastan/larastan": "^3.9.6",
     "laravel/pint": "^1.27",
     "orchestra/testbench": "^10.9",
     "orchestra/workbench": "^10.0.8",