Website: add link to /meetups page (#25135)

Closes: #24974

Changes:
- Added a link to the /meetups page to the website's header navigation
(under the stories dropdown)

website/views/layouts/layout.ejs

@@ -187,6 +187,7 @@
                     <a purpose="mobile-dropdown-link" href="/testimonials">What people are saying</a>
                     <a purpose="mobile-dropdown-link" href="/announcements">News</a>
                     <a purpose="mobile-dropdown-link" href="/support">Ask around</a>
+                    <a purpose="mobile-dropdown-link" href="/meetups">Meetups</a>
                     <span class="mt-2 mb-2">COMPANY</span>
                     <div purpose="indented-mobile-links">
                       <a purpose="mobile-dropdown-link" href="/handbook/company#history">Origins &nbsp; <small>(Fleet &amp; osquery)</small></a>
@@ -249,6 +250,7 @@
                     <a class="dropdown-item" href="/announcements">News</a>
                     <a class="dropdown-item" href="/support">Ask around</a>
                     <a class="dropdown-item" href="/contact">Take a tour</a><!-- «« included here in the desktop hover nav because unlike the mobile nav (which has 'Take a tour' as a primary CTA), there is no option to do that on desktop from other pages otherwise -->
+                    <a class="dropdown-item" href="/meetups">Meetups</a>
                     <span class="muted dropdown-header">COMPANY</span>
                     <a class="dropdown-item" href="/handbook/company#history">Origins &nbsp; <small>(Fleet &amp; osquery)</small></a>
                     <a class="dropdown-item" href="/handbook">The handbook</a>