docs: remove extra slash from nginx redirect

fixes #15

static/index.html

@@ -144,7 +144,7 @@ Finally, configure your web site to redirect these URL paths to the same paths o
 </li>
 
 <li id="nginx"><em><a href="https://nginx.org/">nginx</a></em>: add this to your <code>nginx.conf</code> file, in the <code>server</code> section:<br />
-  <pre>rewrite ^/.well-known/(host-meta|webfinger).* https://fed.brid.gy/$request_uri redirect;</pre>
+  <pre>rewrite ^/.well-known/(host-meta|webfinger).* https://fed.brid.gy$request_uri redirect;</pre>
 </li>
 
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