Update eo-security testimonial (#19136)

Closes https://github.com/fleetdm/fleet/issues/18967 and
https://github.com/fleetdm/confidential/issues/6632

- added the correct video thumbnail
- updated testimonial

website/assets/styles/pages/endpoint-ops.less

@@ -265,7 +265,7 @@
        margin-left: 12px;
      }
      &.charles-zaffery {
-       background: url('/images/homepage-hero-3227x920@2x.png');
+       background: url('/images/video-testimonial-thumbnail-charles-zaffery-223x168@2x.jpg');
        background-position: center;
        background-size: cover;
        margin-right: 0px;

website/views/pages/endpoint-ops.ejs

@@ -46,7 +46,7 @@
           <a href="https://www.linkedin.com/in/charleszaffery/" target="_blank">
           <div purpose="quote">
             <img alt="an opening quotation mark" style="width:20px; margin-bottom: 16px;" src="/images/icon-quote-21x17@2x.png">
-            <p>"Fleet has such a huge amount of use cases. My goal was to get telemetry on endpoints, but then our IR team, our TBM team, and multiple other folks in security started heavily utilizing the system in ways I didn’t expect. It spread so naturally, even our corporate and infrastructure teams want to run it."</p>
+            <p>"We will have no, zero, blind spots in our entire infrastructure, more than 100,000 servers. It just works, it's awesome."</p>
           </div>
           <div purpose="quote-attribution" class="d-flex flex-md-row flex-column align-items-center">
             <div purpose="quote-image"><img src="/images/testimonial-author-charles-zaffery-48x48@2x.png" alt="Charles Zaffery"></div>