Use Sourcemeta logo

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

layouts/partials/navigation.html

@@ -2,7 +2,7 @@
   <div class="container-fluid">
     <a class="navbar-brand" href="{{ .Site.BaseURL }}">
       <img src="{{ .Site.BaseURL }}/logo.svg" alt="Learn JSON Schema Logo"
-        height="42" width="42">
+        height="38" width="38">
     </a>
     <div class="position-relative me-3 flex-grow-1 d-none d-lg-block">
       <div class="input-group">