Fix typo in docker-compose.yml

Signed-off-by: Jonas Schürmann <jonasschuermann@aol.de>

contrib/docker/docker-compose.yml

@@ -47,4 +47,4 @@ services:
       # You may store the database tables in a local folder..
       - ./schemas:/var/lib/postgresql/data
       # .. or store them on some high performance storage for better results
-      # - /path/to/ssd/storage:/var/lib/postfesql/data
+      # - /path/to/ssd/storage:/var/lib/postgresql/data