Adjust a test for tmp_disk_table_size

The parameter was recently introduced in
commit dd8474b1
but this test was not adjusted accordingly.

mysql-test/suite/sys_vars/r/sysvars_server_embedded.result

@@ -4069,6 +4069,34 @@ NUMERIC_BLOCK_SIZE	NULL
 ENUM_VALUE_LIST	NULL
 READ_ONLY	YES
 COMMAND_LINE_ARGUMENT	REQUIRED
+VARIABLE_NAME	TMP_DISK_TABLE_SIZE
+SESSION_VALUE	18446744073709551615
+GLOBAL_VALUE	18446744073709551615
+GLOBAL_VALUE_ORIGIN	COMPILE-TIME
+DEFAULT_VALUE	18446744073709551615
+VARIABLE_SCOPE	SESSION
+VARIABLE_TYPE	BIGINT UNSIGNED
+VARIABLE_COMMENT	Max size for data for an internal temporary on-disk MyISAM or Aria table.
+NUMERIC_MIN_VALUE	1024
+NUMERIC_MAX_VALUE	18446744073709551615
+NUMERIC_BLOCK_SIZE	1
+ENUM_VALUE_LIST	NULL
+READ_ONLY	NO
+COMMAND_LINE_ARGUMENT	REQUIRED
+VARIABLE_NAME	TMP_MEMORY_TABLE_SIZE
+SESSION_VALUE	16777216
+GLOBAL_VALUE	16777216
+GLOBAL_VALUE_ORIGIN	COMPILE-TIME
+DEFAULT_VALUE	16777216
+VARIABLE_SCOPE	SESSION
+VARIABLE_TYPE	BIGINT UNSIGNED
+VARIABLE_COMMENT	If an internal in-memory temporary table exceeds this size, MySQL will automatically convert it to an on-disk MyISAM or Aria table. Same as tmp_table_size.
+NUMERIC_MIN_VALUE	1024
+NUMERIC_MAX_VALUE	18446744073709551615
+NUMERIC_BLOCK_SIZE	1
+ENUM_VALUE_LIST	NULL
+READ_ONLY	NO
+COMMAND_LINE_ARGUMENT	REQUIRED
 VARIABLE_NAME	TMP_TABLE_SIZE
 SESSION_VALUE	16777216
 GLOBAL_VALUE	16777216
@@ -4076,7 +4104,7 @@ GLOBAL_VALUE_ORIGIN	COMPILE-TIME
 DEFAULT_VALUE	16777216
 VARIABLE_SCOPE	SESSION
 VARIABLE_TYPE	BIGINT UNSIGNED
-VARIABLE_COMMENT	If an internal in-memory temporary table exceeds this size, MySQL will automatically convert it to an on-disk MyISAM or Aria table
+VARIABLE_COMMENT	Alias for tmp_memory_table_size. If an internal in-memory temporary table exceeds this size, MySQL will automatically convert it to an on-disk MyISAM or Aria table.
 NUMERIC_MIN_VALUE	1024
 NUMERIC_MAX_VALUE	18446744073709551615
 NUMERIC_BLOCK_SIZE	1