change the number of the items in the print shopping list

[olamakhlouf]

Describe the technical changes contained in this PR changed the number of item in the shopping list displayed in a single page.

Previous behaviour the list wasn't displayed correctly

New behaviour Each page displays 5 items from the shopping list instead of 6

Related issues addressed by this PR Fixes #673

Have the following been addressed?

• [ ] Have test cases been created for all of the changes?
• [ ] Do all of the test cases pass?
• [ ] Has the testing been done using the default docker-compose environment?
• [ ] Are documentation changes required?
• [ ] Does this change break or alter existing behaviour?