Update default.html

Author: h-ikeda

_layouts/default.html

@@ -99,7 +99,7 @@
         </nav>
       {% endif %}
     </div>
-    <p style="background:rgba(254, 105, 63);color:white;border-radius:0.5ex;padding:1em;">
+    <p style="margin:1em;background:rgba(254, 105, 63);color:rgb(252, 242, 242);border-radius:0.5ex;padding:1em;">
       You are browsing the documentation for v0.x.<br>
       <a href="https://vue-gl.github.io" style="font-weight:bold;color:white;">Visit here</a> for the newest version.
     </p>