Fix typo in isolation test spec

Replace 'committs' with 'commits'.

Author: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://postgr.es/m/CAEoWx2=BESkfXsZ9jQW+1NcGTazKuj2wEXsPm1_EpgzHs0BHDQ@mail.gmail.com

src/test/isolation/specs/eval-plan-qual-trigger.spec

@@ -336,7 +336,7 @@ permutation s1_trig_rep_b_u s1_trig_rep_a_u
     s1_ins_a s1_ins_c s1_b_rc s2_b_rc
     s1_upd_a_tob s2_upd_all_data s1_c s2_c
     s0_rep
-# s1 deletes, s2 updates, s1 committs, EPQ failure should lead to no update
+# s1 deletes, s2 updates, s1 commits, EPQ failure should lead to no update
 permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
     s1_ins_a s1_ins_c s1_b_rc s2_b_rc
     s1_del_a s2_upd_a_data s1_c s2_c
@@ -346,7 +346,7 @@ permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
     s1_ins_a s1_ins_c s1_b_rc s2_b_rc
     s1_del_a s2_upd_a_data s1_r s2_c
     s0_rep
-# s1 deletes, s2 deletes, s1 committs, EPQ failure should lead to no delete
+# s1 deletes, s2 deletes, s1 commits, EPQ failure should lead to no delete
 permutation s1_trig_rep_b_d s1_trig_rep_a_d
     s1_ins_a s1_ins_c s1_b_rc s2_b_rc
     s1_del_a s2_del_a s1_c s2_c