Fix typo related to to_tsvector() in tests of json and jsonb

Author: Sho Kato
Reviewed-by: Kyotaro Horiguchi
Discussion: https://postgr.es/m/25C1C6B2E7BE044889E4FE8643A58BA963E1D03D@G01JPEXMBKW03

src/test/regress/expected/json.out

@@ -2427,7 +2427,7 @@ select json_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d":
  '123':5 '456':7 'aaa':1 'bbb':3
 (1 row)
 
--- ts_vector corner cases
+-- to_tsvector corner cases
 select to_tsvector('""'::json);
  to_tsvector 
 -------------

src/test/regress/expected/jsonb.out

@@ -4225,7 +4225,7 @@ select jsonb_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d"
  '123':5 '456':7 'aaa':1 'bbb':3
 (1 row)
 
--- ts_vector corner cases
+-- to_tsvector corner cases
 select to_tsvector('""'::jsonb);
  to_tsvector 
 -------------

src/test/regress/sql/json.sql

@@ -788,7 +788,7 @@ select json_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d":
 select json_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d": true, "f": false, "g": null}'::json, '"boolean"');
 select json_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d": true, "f": false, "g": null}'::json, '["string", "numeric"]');
 
--- ts_vector corner cases
+-- to_tsvector corner cases
 select to_tsvector('""'::json);
 select to_tsvector('{}'::json);
 select to_tsvector('[]'::json);

src/test/regress/sql/jsonb.sql

@@ -1114,7 +1114,7 @@ select jsonb_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d"
 select jsonb_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d": true, "f": false, "g": null}'::jsonb, '"boolean"');
 select jsonb_to_tsvector('english', '{"a": "aaa in bbb", "b": 123, "c": 456, "d": true, "f": false, "g": null}'::jsonb, '["string", "numeric"]');
 
--- ts_vector corner cases
+-- to_tsvector corner cases
 select to_tsvector('""'::jsonb);
 select to_tsvector('{}'::jsonb);
 select to_tsvector('[]'::jsonb);