DOC: fix style and grammar in docs

Author: Liudmila Mantrova

doc/pgprobackup.xml

@@ -1645,10 +1645,8 @@ pg_probackup restore -B <replaceable>backup_dir</replaceable> --instance <replac
      recovery settings are written into the <filename>recovery.conf</filename>
      file. Starting from <productname>PostgreSQL</productname> 12,
      <application>pg_probackup</application> writes these settings into
-     the <filename>probackup_recovery.conf</filename> file in the data
-     directory, and then includes them into the
-     <filename>postgresql.auto.conf</filename> when the cluster is
-     is started.
+     the <filename>probackup_recovery.conf</filename> file and then includes
+     it into <filename>postgresql.auto.conf</filename>.
     </para>
 
     <para>