Bug 27740: (QA follow-up) Fix 'Your purchase suggestions'

Bug 27740: (QA follow-up) Fix 'Your purchase suggestions'

On the purchase suggestions page you could end up with two "Your
purchase suggestions" headings, one as an h1 and one as an h2..

Test plan
1/ Add at least one purchage suggestion to a patron
2/ Navigate to 'Purchase suggestions'
3/ Note that just one 'Your purchase suggestsions' heading appears with
a top level '1'.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Wainui Witika-Park <wainuiwitikapark@catalyst.net.nz>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>