Update dependency vimeo/psalm to v6.15.0

Author: renovate[bot]

composer.json

@@ -75,7 +75,7 @@
         "symfony/maker-bundle": "1.65.1",
         "symfony/stopwatch": "7.2.4",
         "symfony/web-profiler-bundle": "7.2.4",
-        "vimeo/psalm": "6.5.1",
+        "vimeo/psalm": "6.15.0",
         "weirdan/doctrine-psalm-plugin": "2.10.0",
         "zenstruck/browser": "1.10.0"
     },