Add missing parenthesis to Zulip links

templates/_issue.tt

@@ -1 +1 @@
-{% macro render(issue, with_age="") %}"{{issue.title}}" [{{issue.repo_name}}#{{issue.number}}]({{issue.html_url}}){% if issue.mcp_details.zulip_link %} [Zulip]({{issue.mcp_details.zulip_link}}){% endif %}{% if with_age %} (last review activity: {{issue.updated_at_hts}}){% endif %}{% endmacro %}
+{% macro render(issue, with_age="") %}"{{issue.title}}" [{{issue.repo_name}}#{{issue.number}}]({{issue.html_url}}){% if issue.mcp_details.zulip_link %} ([Zulip]({{issue.mcp_details.zulip_link}})){% endif %}{% if with_age %} (last review activity: {{issue.updated_at_hts}}){% endif %}{% endmacro %}