footer: Add https://status.zulip.com link.

Fixes: #14417.

templates/zerver/footer.html

@@ -40,7 +40,8 @@
                 <li><a href="/help/getting-started-with-zulip">{{ _("Getting started") }}</a></li>
                 <li><a href="/help/">{{ _("Help center") }}</a></li>
                 <li><a href="/development-community/" target="_blank">{{ _("Community chat") }}</a></li>
-                <li class="extra_margin"><a href="/help/contact-support">{{ _("Contact support") }}</a></li>
+                <li><a href="/help/contact-support">{{ _("Contact support") }}</a></li>
+                <li class="extra_margin"><a href="https://status.zulip.com/">{{ _("Zulip Cloud status") }}</a></li>
                 <li>
                     <a href="/help/getting-your-organization-started-with-zulip">
                         {{ _("Organization set up") }}

tools/lib/capitalization.py

@@ -46,6 +46,7 @@ IGNORED_PHRASES = [
     r"Zulip Server",
     r"Zulip Account Security",
     r"Zulip Security",
+    r"Zulip Cloud",
     r"Zulip Cloud Standard",
     r"BigBlueButton",
     # Code things