Bug 5016: Fix some translation issues with English PDF order templates

Bug 5016: Fix some translation issues with English PDF order templates

Changes made:
- Instead of n° print no.
- Market Identification => Market identification
- GST => Tax

To test:
- Create at least 2 baskets with one or more orders
- Create a basket group with those baskets
- Print the PDF using
  - the 2 page layout
  - the 3 page layout
- Verify that the changes made appear and everything looks correct

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>