docs: Fix Cloudsmith paths (#135)

Fix #134 

I'm not sure why the old GPG path broke, but apparently it did... but the paths are shorter now, so that's nice.

Author: francislavoie

src/docs/markdown/install.md

@@ -44,16 +44,16 @@ This package also comes with a `caddy-api` systemd service using our official [`
 Stable releases:
 
 <pre><code class="cmd"><span class="bash">sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https</span>
-<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/cfg/gpg/gpg.155B6D79CA56EA34.key' | sudo apt-key add -</span>
-<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/cfg/setup/config.deb.txt?distro=debian&version=any-version' | sudo tee -a /etc/apt/sources.list.d/caddy-stable.list</span>
+<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.155B6D79CA56EA34.key' | sudo apt-key add -</span>
+<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/config.deb.txt?distro=debian&version=any-version' | sudo tee -a /etc/apt/sources.list.d/caddy-stable.list</span>
 <span class="bash">sudo apt update</span>
 <span class="bash">sudo apt install caddy</span></code></pre>
 
 Testing releases (includes betas and release candidates):
 
 <pre><code class="cmd"><span class="bash">sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https</span>
-<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/testing/cfg/gpg/gpg.155B6D79CA56EA34.key' | sudo apt-key add -</span>
-<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/testing/cfg/setup/config.deb.txt?distro=debian&version=any-version' | sudo tee -a /etc/apt/sources.list.d/caddy-testing.list</span>
+<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/testing/gpg.155B6D79CA56EA34.key' | sudo apt-key add -</span>
+<span class="bash">curl -1sLf 'https://dl.cloudsmith.io/public/caddy/testing/config.deb.txt?distro=debian&version=any-version' | sudo tee -a /etc/apt/sources.list.d/caddy-testing.list</span>
 <span class="bash">sudo apt update</span>
 <span class="bash">sudo apt install caddy</span></code></pre>