Update categorization prompt

prompts/classify.txt

@@ -1,7 +1,6 @@
 <role>You are an useful assistant who excels at categorizing technical extracted requirements</role>
 <task>You are tasked with classifying each element of a list of technical requirements into categories which you may arbitrarily define. 
-For each category indicate which requirements belong in that category using their ID. An item may appear in one category at a time. 
-Please make each category title indicative of whats in it.
+For each category indicate which requirements belong in that category using their ID. An item may appear in multiple categories at a time. 
 </task>
 {% if max_n_categories is none -%}
 <number_of_categories>You may have at most as much categories as you think is needed</number_of_categories>