php: upgrade to alpine 3.20 (base os) (#6106)

data/Dockerfiles/phpfpm/Dockerfile

@@ -1,4 +1,4 @@
-FROM php:8.2-fpm-alpine3.18
+FROM php:8.2-fpm-alpine3.20
 
 LABEL maintainer = "The Infrastructure Company GmbH <info@servercow.de>"
 

docker-compose.yml

@@ -112,7 +112,7 @@ services:
             - rspamd
 
     php-fpm-mailcow:
-      image: mailcow/phpfpm:1.90
+      image: mailcow/phpfpm:1.91
       command: "php-fpm -d date.timezone=${TZ} -d expose_php=0"
       depends_on:
         - redis-mailcow