docker: bump postgres from 18.4-alpine to 18.4-alpine (#603)

Author: dependabot[bot]

docker-compose.dev.yaml

@@ -2,7 +2,7 @@ name: riverui-dev
 
 services:
   postgres:
-    image: "postgres:18.4-alpine@sha256:96d56f7f57c6aacd1fcb908bc83b345ec5f83231ee486dd66a1baadce274db88"
+    image: "postgres:18.4-alpine@sha256:1b1689b20d16a014a3d195653381cf2caa75a41a92d93b255a9d6ea29fd353aa"
     environment:
       - POSTGRES_USER=postgres
       - POSTGRES_PASSWORD=postgres