Update zenstruck/foundry requirement from ^2.3 <2.7 to ^2.8.1

Updates the requirements on [zenstruck/foundry](https://github.com/zenstruck/foundry) to permit the latest version.
- [Release notes](https://github.com/zenstruck/foundry/releases)
- [Changelog](https://github.com/zenstruck/foundry/blob/2.x/CHANGELOG.md)
- [Commits](zenstruck/foundry@v2.3.0...v2.8.1)

---
updated-dependencies:
- dependency-name: zenstruck/foundry
  dependency-version: 2.8.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -91,7 +91,7 @@
         "twig/twig": "^3.14",
         "willdurand/hateoas-bundle": "^2.5",
         "winzou/state-machine-bundle": "^0.6.2",
-        "zenstruck/foundry": "^2.3 <2.7"
+        "zenstruck/foundry": "^2.8.1"
     },
     "conflict": {
         "doctrine/orm": "<2.18",