Fix typo in commit 82fa3ff.

Amit Kapila · Amit Kapila · commit c53e40a132dc · 2019-09-20T07:38:06.000+05:30
Reported-By: Kuntal Ghosh (off-list) Backpatch-through: 9.4, like 82fa3ff
diff --git a/doc/src/sgml/maintenance.sgml b/doc/src/sgml/maintenance.sgml
@@ -828,7 +828,7 @@ analyze threshold = analyze base threshold + analyze scale factor * number of tu
 
    <para>
     Autovacuum workers generally don't block other commands.  If a process
-    attempts to acquire a lock that conficts with the
+    attempts to acquire a lock that conflicts with the
     <literal>SHARE UPDATE EXCLUSIVE</literal> lock held by autovacuum, lock
     acquisition will interrupt the autovacuum.  For conflicting lock modes,
     see <xref linkend="table-lock-compatibility"/>.  However, if the autovacuum
