chore(deps): update actions/checkout action to v6.0.1

| datasource  | package          | from   | to     |
| ----------- | ---------------- | ------ | ------ |
| github-tags | actions/checkout | v6.0.0 | v6.0.1 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/php-tests.yml

@@ -18,7 +18,7 @@ jobs:
                     - { php-version: 8.4, dependencies: highest, coverage: pcov, with_coverage: false, allow-fail: true }
         steps:
             -   name: "Checkout"
-                uses: "actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3" # v6.0.0
+                uses: "actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8" # v6.0.1
 
             -   name: "Install PHP"
                 uses: "shivammathur/setup-php@44454db4f0199b8b9685a5d763dc37cbf79108e1" # 2.36.0