Fix typo in comment.

Author: Osumi Takamichi
Discussion: https://postgr.es/m/TYCPR01MB83737EA140C79B7D099F65E8EDC69@TYCPR01MB8373.jpnprd01.prod.outlook.com

Author: Amit Kapila

src/test/regress/expected/subscription.out

@@ -304,7 +304,7 @@ ERROR:  publication "testpub1" is already in subscription "regress_testsub"
  regress_testsub | regress_subscription_user | f       | {testpub,testpub1,testpub2} | f      | off       | d                | f                | any    | off                | dbname=regress_doesnotexist | 0/0
 (1 row)
 
--- fail - publication used more then once
+-- fail - publication used more than once
 ALTER SUBSCRIPTION regress_testsub DROP PUBLICATION testpub1, testpub1 WITH (refresh = false);
 ERROR:  publication name "testpub1" used more than once
 -- fail - all publications are deleted

src/test/regress/sql/subscription.sql

@@ -198,7 +198,7 @@ ALTER SUBSCRIPTION regress_testsub ADD PUBLICATION testpub1, testpub2 WITH (refr
 
 \dRs+
 
--- fail - publication used more then once
+-- fail - publication used more than once
 ALTER SUBSCRIPTION regress_testsub DROP PUBLICATION testpub1, testpub1 WITH (refresh = false);
 
 -- fail - all publications are deleted