Fix Signal href

Author: armanbilge

src/templates/bio.template.html

@@ -32,7 +32,7 @@
         </a>
         @:@
         @:for(_.signal)
-        <a class="bulma-level-item" href=":${_.signal}">
+        <a class="bulma-level-item" href="${_.signal}">
           <span class="bulma-icon bulma-is-small">@:svg(fa-signal-messenger)</span>
         </a>
         @:@