Fix link

Author: diehlpk

index.html

@@ -10,7 +10,7 @@
 
 <header class="blog-header">
     {% if site.logo %}
-      <a class="blog-logo" href="{{site.url}}{{site.baseurl}}" style="background-image: url('{{ site.logo | prepend: site.baseurl }}')">{{ site.title }}</a>
+      <a class="blog-logo" href="https://link.springer.com/book/10.1007/978-3-031-54369-2" style="background-image: url('{{ site.logo | prepend: site.baseurl }}')">{{ site.title }}</a>
     {% endif %}
     <h1 class="blog-title">{{ site.title }}</h1>
     <h2 class="blog-description">{{ site.description }}</h2>