[Postgres] Bump to 13.4

CERTFR-2021-AVI-626

gitea/docker-compose.yml

@@ -37,7 +37,7 @@ services:
       - "traefik.http.routers.git-https.tls.certresolver=myhttpchallenge"
 
   db:
-    image: postgres:13.3
+    image: postgres:13.4
 #    env_file: ./secrets/db.secrets
     restart: unless-stopped
     volumes: