Change nonterminal name to something more fitting

psGrammar/tasks/receptionist/getDrink.jsgf

 #JSGF V1.0;
 grammar getName;
-public <confirm> = [<prefix>] <drink> [<robot>];
+public <drinkstring> = [<prefix>] <drink> [<robot>];
 
 <prefix> = (<myfavdrink> | <ilike>);
 

psGrammar/tasks/receptionist/getName.jsgf

 #JSGF V1.0;
 grammar getName;
-public <confirm> = [<prefix>] <name> [<robot>];
+public <namestring> = [<prefix>] <name> [<robot>];
 
 <prefix> = (<iam> | <nameis> | <callme>);