Make this description sound less like the catering team are paid

Could still be improved but I'll change this before we forget

apps/volunteer/data/roles/kitchen_assistant.yml

@@ -1,8 +1,8 @@
 name: Kitchen Assistant
-description: Help our excellent catering team provide food for all the volunteers.
+description: Help provide food for all the volunteers.
 full_description_md: |
-  Help our excellent catering team provide food for all the volunteers.
+  Help in our excellent volunteer kitchen to provide food for all the volunteers.
   
-  Mostly you'll be chopping vegetables, washing up, and serving food, the catering team will handle the actual cooking.
+  Mostly you'll be chopping vegetables, washing up, and serving food.
 
   Bonus: Kitchen roles get an additional meal for the shift they work!