Fixes typo in issue.html template

alerts/templates/alerts/issue.html

@@ -1,5 +1,5 @@
 {% if issue_count == 1 %}
 {% include "alerts/issue-drip.html" %}
 {% else %}
-{% include "alerts/multiple-issue-drip.html" %}
+{% include "alerts/multiple-issues-drip.html" %}
 {% endif %}