add 5snb.club badge

content/_index.md

···
     {{ badge(url="https://isabelroses.com", src="/badges/friends/isabelroses.webp", alt="isabel roses")}}
     {{ badge(url="https://natalieee.net", src="/badges/friends/natalieee.net.png", alt="natalieee dot net") }}
     {{ badge(url="https://chloes.website", src="/badges/friends/chloe.png", alt="chloe cat") }}
+    {{ badge(url="https://5snb.club/", src="/badges/friends/[e-mail]", alt="[e-mail]") }}
 </div>
 
 ### other things {#badges-other}