[2441] Add a different name so that the next ns1 record is not grouped together with others

src/lib/datasrc/tests/memory/testdata/example.org-duplicate-type-bad.zone

@@ -3,4 +3,5 @@ example.org.			      3600 IN NS	ns1.example.org.
 example.org.			      3600 IN NS	ns2.example.org.
 ns1.example.org.		      3600 IN A	 	192.168.0.1
 ns1.example.org.		      3600 IN AAAA 	::1
+someother.example.org.		      3600 IN AAAA 	::1
 ns1.example.org.		      3600 IN A	 	192.168.0.2