Update examples.md

Author: jeffdyer

packages/api/spec/examples.md

@@ -99,7 +99,7 @@
 75. Put values 10, 20, and 30 in A1 through A3. Assess cell A4 expecting the student to enter the formula =SUM(A1:A3).
 76. Put test scores 80, 90, 70, 85, 95 in B1 through B5. Assess cell B6 expecting the student to enter =AVERAGE(B1:B5).
 77. Create a spreadsheet where cell A3 is assessed for the value "30" and cell B3 is assessed for the formula =SUM(B1:B2).
-78. Create an assessed cell where acceptable answers are in the range 100 to 200 with a step of 50.
+78. Create an assessed cell where acceptable answers are in the range 100 to 200 with a step of 50. (BUG: not supported, but good idea)
 
 ## Category 8: Params / Templates (79–85)