Address PR review feedback

Signed-off-by: Margarit Hakobyan <margarith@bitquilltech.com>

Author: margarit-h

docs/user/dql/functions.rst

@@ -2346,7 +2346,7 @@ Return type integer:
 
 Example::
 
-    opensearchsql> SELECT POSITION('world' IN 'helloworld'), POSITION('invalid' IN 'helloworld');
+    os> SELECT POSITION('world' IN 'helloworld'), POSITION('invalid' IN 'helloworld');
     fetched rows / total rows = 1/1
     +-------------------------------------+---------------------------------------+
     | POSITION('world' IN 'helloworld')   | POSITION('invalid' IN 'helloworld')   |