Update ghcr.io/selfhst/icons Docker tag to v4

adminer/compose.yaml

@@ -1,7 +1,7 @@
 services:
   adminer:
     container_name: adminer
-    image: docker.io/library/adminer:5.4.2@sha256:8b5b5195c8c75e40ea1d60af5fc93cc7830f7bd5cd74b184e027ff16301a9302
+    image: docker.io/library/adminer:5.4.2@sha256:2fb88b98da9f0ae0157d8fcb73f447a0747b09ee8d2ff8a8e0695b30afed2116
     restart: unless-stopped
     ports:
       - ${PORT}:8080

selfhst-icons/compose.yaml

@@ -1,7 +1,7 @@
 services:
   selfhst-icons:
     container_name: selfhst-icons
-    image: ghcr.io/selfhst/icons:3.2.0@sha256:3a6db28194ac905f9cfa8529b2abf7a3c21b688c5515b47c4a28ae49c16fa0fc
+    image: ghcr.io/selfhst/icons:4.0.1@sha256:f0658cd6e6857dd0cdd29ec29e6935d4c3becde13fbcb76e7dd861a51e0d173c
     restart: unless-stopped
     environment:
       - ICON_SOURCE=remote