Update base image stability tag to 2.18.4

Author: wodbot

.github/workflows/workflow.yml

@@ -9,7 +9,7 @@ on:
     - '*'
 
 env:
-  BASE_IMAGE_STABILITY_TAG: 2.18.3
+  BASE_IMAGE_STABILITY_TAG: 2.18.4
   MARIADB114: '11.4.8'
   MARIADB1011: '10.11.14'
   MARIADB106: '10.6.23'