fix: stop overriding Composer platform.php to 8.4 in CI

Symfony 8.1 requires PHP >=8.4.1; platform.php "8.4" resolves as 8.4.0
and breaks the Symfony 8 matrix install on PHP 8.4/8.5 runners.

Author: HecFranco

.github/workflows/ci.yml

@@ -71,9 +71,8 @@ jobs:
             ${{ runner.os }}-php-${{ matrix.php }}-symfony-${{ matrix.symfony }}-composer-
             ${{ runner.os }}-php-${{ matrix.php }}-composer-
 
-      - name: Override platform for Symfony 8 (requires PHP 8.4+)
-        if: startsWith(matrix.symfony, '8.')
-        run: composer config platform.php 8.4
+      # Do not set platform.php to "8.4" — Composer treats it as 8.4.0, but Symfony 8.1 requires >=8.4.1.
+      # Matrix already runs Symfony 8 only on PHP 8.4 / 8.5 via setup-php.
 
       - name: Install dependencies with Symfony ${{ matrix.symfony }}
         run: |

docs/CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Fixed
+
+- CI: remove `composer config platform.php 8.4` for Symfony 8 jobs (Composer treats `8.4` as `8.4.0`, which fails Symfony 8.1’s `php >=8.4.1` requirement).
+
 ## [1.0.4] - 2026-07-20
 
 ### Added