fix: doc: correct some mistakes around script to use ``pgm cp`` for restoring database

README.org

@@ -1107,8 +1107,10 @@ Récupération des derniers dumps:
 
 #+begin_src sh
 compose --debug up postgres
-for dump in /srv/datastore/data/postgres/var/backups/pg; do
-    pgm cp "$dump" postgres@"${dump%%.*}"
+for dump in /srv/datastore/data/postgres/var/backups/pg/*; do
+    dbname=${dump##*/}
+    dbname=${dbname%%.*}
+    pgm cp "$dump" postgres@"${dbname}"
 done
 #+end_src