Comparison blocks look terrible using json as the language in GitHub markdown viewer -- going back to text

Signed-off-by: Matt Lord <[email protected]>

Author: mattlord

changelog/20.0/20.0.0/summary.md

@@ -131,7 +131,7 @@ update enum_set_test set shirt_size = 'small', hobbies = 'knitting,cooking,hikin
 
 Vitess v19 and older:
 
-```json
+```text
 [type:BEGIN keyspace:"commerce" shard:"0" type:FIELD field_event:{table_name:"commerce.enum_set_test" fields:{name:"id" type:INT32 table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"id" column_length:11 charset:63 flags:49667 column_type:"int"} fields:{name:"name" type:VARCHAR table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"name" column_length:480 charset:255 column_type:"varchar(120)"} fields:{name:"shirt_size" type:ENUM table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"shirt_size" column_length:28 charset:255 flags:256 column_type:"enum('small','medium','large','xlarge','xxlarge')"} fields:{name:"hobbies" type:SET table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"hobbies" column_length:288 charset:255 flags:2048 column_type:"set('knitting','cooking','pickleball','biking','hiking','motorcycle','video games','reading')"} keyspace:"commerce" shard:"0"} keyspace:"commerce" shard:"0"]
 [type:VGTID vgtid:{shard_gtids:{keyspace:"commerce" shard:"0" gtid:"MySQL56/ce357206-0d49-11ef-8fd1-a74564279579:1-35"}} keyspace:"commerce" shard:"0"]
 [type:ROW row_event:{table_name:"commerce.enum_set_test" row_changes:{after:{lengths:1 lengths:9 lengths:6 lengths:15 values:"1Billy Bobxlargecooking,reading"}} keyspace:"commerce" shard:"0"} keyspace:"commerce" shard:"0" type:ROW row_event:{table_name:"commerce.enum_set_test" row_changes:{after:{lengths:1 lengths:9 lengths:6 lengths:23 values:"2Sally Maemediumknitting,cooking,hiking"}} keyspace:"commerce" shard:"0"} keyspace:"commerce" shard:"0" type:VGTID vgtid:{shard_gtids:{keyspace:"commerce" shard:"0" gtid:"MySQL56/ce357206-0d49-11ef-8fd1-a74564279579:1-35" table_p_ks:{table_name:"enum_set_test" lastpk:{fields:{name:"id" type:INT32 charset:63 flags:49667} rows:{lengths:1 values:"2"}}}}} keyspace:"commerce" shard:"0" type:COMMIT keyspace:"commerce" shard:"0"]
@@ -144,7 +144,7 @@ Vitess v19 and older:
 
 Vitess v20 and newer:
 
-```json
+```text
 [type:BEGIN keyspace:"commerce" shard:"0" type:FIELD field_event:{table_name:"commerce.enum_set_test" fields:{name:"id" type:INT32 table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"id" column_length:11 charset:63 flags:49667 column_type:"int"} fields:{name:"name" type:VARCHAR table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"name" column_length:480 charset:255 column_type:"varchar(120)"} fields:{name:"shirt_size" type:ENUM table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"shirt_size" column_length:28 charset:255 flags:256 column_type:"enum('small','medium','large','xlarge','xxlarge')"} fields:{name:"hobbies" type:SET table:"enum_set_test" org_table:"enum_set_test" database:"vt_commerce" org_name:"hobbies" column_length:288 charset:255 flags:2048 column_type:"set('knitting','cooking','pickleball','biking','hiking','motorcycle','video games','reading')"} keyspace:"commerce" shard:"0" enum_set_string_values:true} keyspace:"commerce" shard:"0"]
 [type:VGTID vgtid:{shard_gtids:{keyspace:"commerce" shard:"0" gtid:"MySQL56/156f702a-0d47-11ef-8723-653d045ab990:1-50"}} keyspace:"commerce" shard:"0"]
 [type:ROW row_event:{table_name:"commerce.enum_set_test" row_changes:{after:{lengths:1 lengths:9 lengths:6 lengths:15 values:"1Billy Bobxlargecooking,reading"}} keyspace:"commerce" shard:"0"} keyspace:"commerce" shard:"0" type:ROW row_event:{table_name:"commerce.enum_set_test" row_changes:{after:{lengths:1 lengths:9 lengths:6 lengths:23 values:"2Sally Maemediumknitting,cooking,hiking"}} keyspace:"commerce" shard:"0"} keyspace:"commerce" shard:"0" type:VGTID vgtid:{shard_gtids:{keyspace:"commerce" shard:"0" gtid:"MySQL56/156f702a-0d47-11ef-8723-653d045ab990:1-50" table_p_ks:{table_name:"enum_set_test" lastpk:{fields:{name:"id" type:INT32 charset:63 flags:49667} rows:{lengths:1 values:"2"}}}}} keyspace:"commerce" shard:"0" type:COMMIT keyspace:"commerce" shard:"0"]