fix:the license image uniform adjustments (#691)

Co-authored-by: Lukas Wallrich <lukas.wallrich@gmail.com>

Author: richarddushime

layouts/shortcodes/license.html

@@ -74,7 +74,7 @@
   <div class="license-content">
     <p>{{ $text | markdownify }}</p>
     <a href="{{ $link }}" target="_blank" rel="noopener" class="license-badge">
-      <img src="{{ $image }}" alt="License">
+      <img style="margin: 4px auto;" src="{{ $image }}" alt="License">
     </a>
   </div>
 </div>
@@ -93,7 +93,7 @@
   text-align: center;
 }
 .license-note .license-content p {
-  margin-bottom: 0.5rem;
+  margin-bottom: 0.4rem;
 }
 .license-note .license-badge {
   display: inline-block;