Change caption to be consistent with rest of the sidebar

Author: maartenba

astro/src/components/PageSidebar.astro

@@ -23,7 +23,7 @@ const contributors = filePath ? (contributorsData as Record<string, { username:
         <div class="sidebar-meta">
           {contributors.length > 0 && (
             <div class="meta-section">
-              <h2>Page Contributors</h2>
+              <h2>Page contributors</h2>
               <div class="contributor-avatars">
                 {contributors.map((c) => (
                     <a href={c.profileUrl} title={c.username} target="_blank" rel="noopener noreferrer">