replace home with leaps wg3 logo

_data/navigation.yml

 # called items with site.data.navigation
-- name: Home
-  link: "/"
-
 - name: Members
   link: "/members.html"
   description: Who are the people behind LEAPS WG3?

_includes/navigation.html

 <nav>
-  <a href="https://leaps-initiative.eu/"><img src='{{ "/assets/images/leaps-logo.png" | relative_url }}' alt="LEAPS logo"></a>
+  <a href="/"><img src='{{ "/assets/images/LEAPS-WG3-logo.png" | relative_url }}' alt="LEAPS WG3 logo"></a>
   <ul>
     {% for item in site.data.navigation %}
       <li>