Add links to GPG keys

download.html.in

@@ -54,8 +54,8 @@ See the <a href="https://pypi.python.org/pypi/youtube_dl">pypi page</a> for more
 
 <p>The following GPG keys will be used to sign the binaries and the git tags:</p>
 <ul>
-<li>Philipp Hagemeister <code class="fingerprint">7D33 D762 FD6C 3513 0481  347F DB4B 54CB A482 6A18</code></li>
-<li>Sergey M. <code class="fingerprint">ED7F 5BF4 6B3B BED8 1C87  368E 2C39 3E0F 18A9 236D</code></li>
+<li>Philipp Hagemeister <code class="fingerprint"><a href="https://phihag.de/keys/A4826A18.asc">7D33 D762 FD6C 3513 0481  347F DB4B 54CB A482 6A18</a></code></li>
+<li>Sergey M. <code class="fingerprint"><a href="https://dstftw.github.io/keys/18A9236D.asc">ED7F 5BF4 6B3B BED8 1C87  368E 2C39 3E0F 18A9 236D</a></code></li>
 </ul>
 
 <p>Older releases are also signed with one of: