Update dependency symfony/yaml to v8

| datasource | package      | from   | to    |
| ---------- | ------------ | ------ | ----- |
| packagist  | symfony/yaml | 7.4.15 | 8.1.2 |


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

Author: renovate[bot]

composer.json

@@ -45,7 +45,7 @@
         "phpunit/phpunit": "^9.6.31",
         "predis/predis": "^3.0.0",
         "psalm/plugin-phpunit": "^0.18.4",
-        "symfony/yaml": "^6.4.26 || ^7.4.1",
+        "symfony/yaml": "^8.0.0",
         "vimeo/psalm": "^4.30.0"
     },
     "conflict": {