Fix the typo in the test case added in 73eba5004a.

Author: vignesh C <vignesh21@gmail.com>
Discussion: https://postgr.es/m/CALDaNm2ms1deM5EYNLFEfESv_Kw=Y4AiTB0LP=qGS-UpFwGbPg@mail.gmail.com
Discussion: https://postgr.es/m/CABdArM7FW-_dnthGkg2s0fy1HhUB8C3ELA0gZX1kkbs1ZZoV3Q@mail.gmail.com

src/test/subscription/t/035_conflicts.pl

@@ -76,7 +76,7 @@ $node_subscriber->wait_for_log(
 .*Key \(c\)=\(4\); existing local tuple \(4, 4, 4\); remote tuple \(2, 3, 4\)./,
 	$log_offset);
 
-pass('multiple_unique_conflicts detected during update');
+pass('multiple_unique_conflicts detected during insert');
 
 # Truncate table to get rid of the error
 $node_subscriber->safe_psql('postgres', "TRUNCATE conf_tab;");
@@ -108,6 +108,6 @@ $node_subscriber->wait_for_log(
 .*Key \(c\)=\(8\); existing local tuple \(8, 8, 8\); remote tuple \(6, 7, 8\)./,
 	$log_offset);
 
-pass('multiple_unique_conflicts detected during insert');
+pass('multiple_unique_conflicts detected during update');
 
 done_testing();