Restore accidentally removed closing `</style>` tag
Restore accidentally removed closing `</style>` tag

Removed in https://github.com/ebmdatalab/openprescribing/pull/3434

annapowellsmith/openpresc,ebmdatalab/openprescribing,ebmdatalab/openprescribing,annapowellsmith/openpresc,ebmdatalab/openprescribing,ebmdatalab/openprescribing,annapowellsmith/openpresc,annapowellsmith/openpresc