Update another variant expected-result file.

This should have been updated in 533e9c6b0, but it was overlooked.
Given the lack of complaints, I won't bother back-patching.

src/test/isolation/expected/lock-update-delete_1.out

@@ -150,7 +150,9 @@ pg_advisory_unlock
 
 t              
 step s1l: <... completed>
-error in steps s2_unlock s1l: ERROR:  could not serialize access due to concurrent update
+key            value          
+
+1              1              
 
 starting permutation: s2b s1l s2u s2_blocker1 s2r s2_unlock
 pg_advisory_lock