chore(docker): bump roundcube/roundcubemail Docker tag to v1.7.3

docker/infrastructure/mail/roundcube/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   roundcube:
-    image: roundcube/roundcubemail:1.7.2-apache
+    image: roundcube/roundcubemail:1.7.3-apache
     container_name: roundcube
     networks:
       - default

infra/r740/docker/main.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     docker = {
       source  = "kreuzwerker/docker"
-      version = "3.9.0"
+      version = "3.6.2"
     }
   }
 }