Bug 40614: Invalid markup in cookie consent modal

This patch corrects a minor markup error in the OPAC's cookie consent
modal, removing a "type" attribute from an <a> tag.

To test apply the patch and make sure you have the CookieConsent system
preference enabled.

- Go to the OPAC. You should see a cookie consent banner across the
  bottom of the page.
- Click "More information."
- Click "Cancel" in the modal window. The modal should close.

Sponsored-by: Athens County Public Libraries
Signed-off-by: Noah Tremblay <noah.tremblay@inlibro.com>

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 86d79a48d3)
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>
(cherry picked from commit 7d8b9337c0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>

koha-tmpl/opac-tmpl/bootstrap/en/includes/masthead.inc

@@ -530,7 +530,7 @@
                                 <button type="button" class="btn btn-primary consentAcceptAll">Accept all cookies</button>
                                 <button type="button" class="btn btn-warning" id="consentAcceptSelected">Accept selected non-essential cookies</button>
                             [% END %]
-                            <a type="button" href="#" class="btn btn-secondary consentCloseModal">Cancel</a>
+                            <a href="#" class="btn btn-secondary consentCloseModal">Cancel</a>
                         </div>
                     </div>
                 </div> <!-- /.modal-content -->