Update php version to 8.4

Ticket: https://phabricator.wikimedia.org/T387976

Author: Sperling-0

.woodpecker/ci.yml

@@ -12,7 +12,8 @@ clone:
 matrix:
     CONTAINER_IMAGE:
         - registry.gitlab.com/fun-tech/fundraising-frontend-docker:latest
-        - registry.gitlab.com/fun-tech/fundraising-frontend-docker/php-8.4:latest
+        # Use the following image in future (Jan/Feb 2026)
+        # - registry.gitlab.com/fun-tech/fundraising-frontend-docker:php-8.5
 
 steps:
     - name: build

composer.json

@@ -3,7 +3,7 @@
 	"description": "Address change use case for fundraising application",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"php": ">=8.3",
+		"php": ">=8.4",
 		"doctrine/orm": "~3.0",
 		"doctrine/dbal": "~4.0",
 		"ramsey/uuid": "^4.0",