fix: correct postgres volume path in compose.yaml

Co-authored-by: Copilot <copilot@github.com>

nodes/heimdall/reactive-resume/compose.yaml

@@ -9,7 +9,7 @@ services:
     networks:
       - proxy-net
     volumes:
-      - /mnt/appdata/reactive-resume/postgres:/var/lib/postgresql
+      - /mnt/appdata/reactive-resume/postgres:/var/lib/postgresql/data
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres -d postgres"]
       interval: 10s