Bug#46947 "Embedded SELECT without FOR UPDATE is causing a lock"

Update the result file to minor tweaks of the comments in the
test case.

mysql-test/r/lock_sync.result

@@ -508,7 +508,7 @@ Success: 'insert into t2 values (f13((select i+10 from t1 where i=1)))' doesn't
 #
 # Since neither this statement nor its components are
 # written to the binary log, there is no need to take
-# strong locks on the data read it reads.
+# strong locks on the data it reads.
 Success: 'call p2(@a)' allows concurrent inserts into 't1'.
 #
 # 5.2 Function that modifes data and uses CALL,