Fix typo in previous commit

Author: simonat2ndQuadrant

doc/src/sgml/indices.sgml

@@ -199,7 +199,7 @@ CREATE INDEX <replaceable>name</replaceable> ON <replaceable>table</replaceable>
     after a database crash if there were unwritten changes.
     Also, changes to hash indexes are not replicated over streaming or
     file-based replication after the initial base backup, so they
-    give wrong anwers to queries that subsequently use them.
+    give wrong answers to queries that subsequently use them.
     For these reasons, hash index use is presently discouraged.
    </para>
   </caution>

doc/src/sgml/ref/create_index.sgml

@@ -473,7 +473,7 @@ Indexes:
     after a database crash if there were unwritten changes.
     Also, changes to hash indexes are not replicated over streaming or
     file-based replication after the initial base backup, so they
-    give wrong anwers to queries that subsequently use them.
+    give wrong answers to queries that subsequently use them.
     For these reasons, hash index use is presently discouraged.
    </para>
   </caution>