Bump symfony/flex from 2.7.1 to 2.8.1 (#351)

Bumps [symfony/flex](https://github.com/symfony/flex) from 2.7.1 to 2.8.1.
- [Release notes](https://github.com/symfony/flex/releases)
- [Commits](https://github.com/symfony/flex/compare/v2.7.1...v2.8.1)

---
updated-dependencies:
- dependency-name: symfony/flex
  dependency-version: 2.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.lock

@@ -2646,16 +2646,16 @@
         },
         {
             "name": "symfony/flex",
-            "version": "v2.7.1",
+            "version": "v2.8.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/flex.git",
-                "reference": "4ae50d368415a06820739e54d38a4a29d6df9155"
+                "reference": "423c36e369361003dc31ef11c5f15fb589e52c01"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/flex/zipball/4ae50d368415a06820739e54d38a4a29d6df9155",
-                "reference": "4ae50d368415a06820739e54d38a4a29d6df9155",
+                "url": "https://api.github.com/repos/symfony/flex/zipball/423c36e369361003dc31ef11c5f15fb589e52c01",
+                "reference": "423c36e369361003dc31ef11c5f15fb589e52c01",
                 "shasum": ""
             },
             "require": {
@@ -2694,7 +2694,7 @@
             "description": "Composer plugin for Symfony",
             "support": {
                 "issues": "https://github.com/symfony/flex/issues",
-                "source": "https://github.com/symfony/flex/tree/v2.7.1"
+                "source": "https://github.com/symfony/flex/tree/v2.8.1"
             },
             "funding": [
                 {
@@ -2710,7 +2710,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2025-05-28T14:22:54+00:00"
+            "time": "2025-07-05T07:45:19+00:00"
         },
         {
             "name": "symfony/http-foundation",
@@ -4404,6 +4404,6 @@
     "platform": {
         "php": "~8.4"
     },
-    "platform-dev": [],
-    "plugin-api-version": "2.3.0"
+    "platform-dev": {},
+    "plugin-api-version": "2.6.0"
 }