Bug 35795: Missing closing tag in OPAC course details template

Bug 35795: Missing closing tag in OPAC course details template

This patch adds a missing closing tag, "</em>" to the breadcrumb
navigation shown when viewing the detail page of a course.

To test you must have at least one course created in the course reserves
module (Course reserves -> New course)

- Apply the patch and go to the OPAC.
- Open the Course reserves page and click the name of the course you
  created.
- The last item in the breadcrumb menu should be "Course reserves for
  [your course name]" and "you_course_name" should be in italics.
- The rest of the page should look correct.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit a7f914bf3b521b464c673c5cbf406d9ce9feea19)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>