Update dependency phpstan/phpstan-strict-rules to v2.0.6 (#452)

| datasource | package                      | from  | to    |
| ---------- | ---------------------------- | ----- | ----- |
| packagist  | phpstan/phpstan-strict-rules | 2.0.4 | 2.0.6 |

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

Author: renovate[bot]

composer.json

@@ -37,6 +37,6 @@
     },
     "require-dev": {
         "phpstan/phpstan": "2.1.18",
-        "phpstan/phpstan-strict-rules": "2.0.4"
+        "phpstan/phpstan-strict-rules": "2.0.6"
     }
 }