chore(deps): update adminer:5.4.2-standalone docker digest to c9455d3

Author: renovate[bot]

src/development/stack.yml

@@ -35,7 +35,7 @@ services:
       - traefik.http.routers.adminer_secure.rule=Host(`adminer.${STACK_DOMAIN}`)
       - traefik.http.routers.adminer_secure.tls.options=mintls13@file #DARGSTACK-REMOVE
       - traefik.http.services.adminer.loadbalancer.server.port=8080
-    image: adminer:5.4.2-standalone@sha256:16a72c6140f64d00a3a9edf8d3d3b18a7b0a29ca31b0453378d9eb71f01f9e34
+    image: adminer:5.4.2-standalone@sha256:c9455d3efe3c5c1a3fb266fe51e7711a8f86ddd76c020359633e1f64827a9736
     volumes:
     - ../production/configurations/adminer/adminer.css:/var/www/html/adminer.css:ro
   dargstack-example: