Updated authentik db service name to db in all locations

authentik/docker-compose.yml

@@ -51,7 +51,7 @@ services:
       - "${COMPOSE_PORT_HTTP:-9000}:9000"
       - "${COMPOSE_PORT_HTTPS:-9443}:9443"
     depends_on:
-      postgresql:
+      db:
         condition: service_healthy
       redis:
         condition: service_healthy
@@ -80,7 +80,7 @@ services:
     env_file:
       - .env
     depends_on:
-      postgresql:
+      db:
         condition: service_healthy
       redis:
         condition: service_healthy
@@ -93,4 +93,4 @@ volumes:
 
 networks:
   proxy-net:
-    external: true
+    external: true