Update opensmtpd stability tag to 1.24.0

Author: wodbot

.env

@@ -90,7 +90,7 @@ OPENSEARCH_ADMIN_PASSWORD=VERY%@bad123password
 ADMINER_TAG=5-4.1.4
 APACHE_TAG=2.4-4.15.3
 MEMCACHED_TAG=1-2.19.1
-OPENSMTPD_TAG=7-1.23.1
+OPENSMTPD_TAG=7-1.24.0
 RSYSLOG_TAG=latest
 WEBGRIND_TAG=1-1.36.3
 XHPROF_TAG=3.14.3