updated staff_cheatsheet

iexcode/staff_cheatsheet.md

@@ -326,6 +326,7 @@ detector dictionionary for staff
 
 ## **storage ring**
 wait_for_beam()                 #waits for storage ring current to be above ring_current
+ring_current_get()              #gets the current storage ring current
 
 ## **userCals** 
 functions for filling in user calcs and string Sequences