Bump doctrine/persistence to ^3.1

Author: nicolas-grekas

composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=8.1",
         "doctrine/event-manager": "^1.2|^2",
-        "doctrine/persistence": "^2|^3",
+        "doctrine/persistence": "^3.1",
         "symfony/deprecation-contracts": "^2.5|^3",
         "symfony/polyfill-ctype": "~1.8",
         "symfony/polyfill-mbstring": "~1.0",