Fix the README

Author: Zakirov Artur

README.md

@@ -67,15 +67,15 @@ CREATE INDEX rumidx ON test_rum USING rum (a rum_tsvector_ops);
 And we can execute the following queries:
 
 ```sql
-=# SELECT t, a >< to_tsquery('english', 'beautiful | place') AS rank FROM test_rum WHERE a @@ to_tsquery('english', 'beautiful | place') order by a >< to_tsquery('english', 'beautiful | place');
+=> SELECT t, a >< to_tsquery('english', 'beautiful | place') AS rank FROM test_rum WHERE a @@ to_tsquery('english', 'beautiful | place') order by a >< to_tsquery('english', 'beautiful | place');
                 t                |   rank
 ---------------------------------+-----------
  The situation is most beautiful | 0.0303964
  It is a beautiful               | 0.0303964
  It looks like a beautiful place | 0.0607927
 (3 rows)
 
-=# SELECT t, a >< to_tsquery('english', 'place | situation') AS rank FROM test_rum WHERE a @@ to_tsquery('english', 'place | situation') order by a >< to_tsquery('english', 'place | situation');
+=> SELECT t, a >< to_tsquery('english', 'place | situation') AS rank FROM test_rum WHERE a @@ to_tsquery('english', 'place | situation') order by a >< to_tsquery('english', 'place | situation');
                 t                |   rank
 ---------------------------------+-----------
  The situation is most beautiful | 0.0303964