build(deps): update saloonphp/saloon requirement from ^3.0 to ^4.0

Updates the requirements on [saloonphp/saloon](https://github.com/saloonphp/saloon) to permit the latest version.
- [Release notes](https://github.com/saloonphp/saloon/releases)
- [Commits](saloonphp/saloon@v3.0.0...v4.0.0)

---
updated-dependencies:
- dependency-name: saloonphp/saloon
  dependency-version: 4.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

composer.json

@@ -20,7 +20,7 @@
   "require": {
     "php": "^8.2",
     "lcobucci/jwt": "^5.5",
-    "saloonphp/saloon": "^3.0"
+    "saloonphp/saloon": "^4.0"
   },
   "require-dev": {
     "laravel/pint": "^1.14",