fix: standardize "caregiver" to "carer" the landing page

Author: yixuanwu4

apps/website/src/sections/Spotlight.astro

@@ -130,7 +130,7 @@ import PlayButton from "../assets/videos/play-button.svg";
 <section>
   <div class="intro">
     <h1>Gather language exposure data</h1>
-    <p>Efficient documenting <strong>children's</strong> language exposure by caregiver, language and time.</p>
+    <p>Efficient documenting <strong>children's</strong> language exposure by carer, language and time.</p>
   </div>
   <div class="quassel-video">
     <video controls poster={Poster.src} muted playsinline>