Update contacts to include signal username

src/gmi/tpl/index.gmi

@@ -17,11 +17,13 @@ Below you'll find other information and links related to me.
 
 ## Social
 
-Feel free to hmu over email if you'd like to get in touch.
+Feel free to hmu over email or Signal if you'd like to get in touch.
 
-* Email: me@mediocregopher.com
+=> mailto:me@mediocregopher Email: me@mediocregopher.com
 
-=> {{ BlogURL "me@mediocregopher.com.gpg" }} * GPG Key
+=> {{ BlogURL "me@mediocregopher.com.gpg" }} GPG Key
+
+=> https://signal.me/#eu/x5psueq2E3WfFwwEgFDoWeSZx9k4u8vFBaiMSa4Lo0cvluHkb-dIpJp1wfdJsdie Signal: mediocregopher.01
 
 ## Dev
 

src/http/tpl/index.html

@@ -9,10 +9,15 @@
   </p>
 
   <h2>Social</h2>
-  <p>Feel free to hmu over email if you'd like to get in touch.</p>
+  <p>Feel free to hmu over email or Signal if you'd like to get in touch.</p>
   <ul>
     <li>Email: <a href="mailto:me@mediocregopher.com">me@mediocregopher.com</a></li>
     <li><a href="{{ StaticURL "me@mediocregopher.com.gpg" }}">GPG Key</a></li>
+    <li>Signal:
+      <a href="https://signal.me/#eu/x5psueq2E3WfFwwEgFDoWeSZx9k4u8vFBaiMSa4Lo0cvluHkb-dIpJp1wfdJsdie">
+        mediocregopher.01
+      </a>
+    </li>
   </ul>
 
   <h2>Dev</h2>