Update guzzlehttp/guzzle requirement from ^7.4 to ^7.8

Updates the requirements on [guzzlehttp/guzzle](https://github.com/guzzle/guzzle) to permit the latest version.
- [Release notes](https://github.com/guzzle/guzzle/releases)
- [Changelog](https://github.com/guzzle/guzzle/blob/7.8/CHANGELOG.md)
- [Commits](guzzle/guzzle@7.4.0...7.8.1)

---
updated-dependencies:
- dependency-name: guzzlehttp/guzzle
  dependency-type: direct:production
...

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

composer.json

@@ -15,7 +15,7 @@
     ],
     "require": {
         "php": "^8.0",
-        "guzzlehttp/guzzle": "^7.4",
+        "guzzlehttp/guzzle": "^7.8",
         "illuminate/contracts": "^9.0",
         "illuminate/http": "^9.9",
         "illuminate/support": "^9.9",