Update vimeo/psalm requirement from ^6.14.3 to ^6.15.1

Updates the requirements on [vimeo/psalm](https://github.com/vimeo/psalm) to permit the latest version.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@6.14.3...6.15.1)

---
updated-dependencies:
- dependency-name: vimeo/psalm
  dependency-version: 6.15.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -61,7 +61,7 @@
         "mockery/mockery": "^1.6",
         "orchestra/testbench": "^10.8.0",
         "phpunit/phpunit": "^10.0|^11.5",
-        "vimeo/psalm": "^6.14.3"
+        "vimeo/psalm": "^6.15.1"
     },
     "config": {
         "sort-packages": true