Redo PC Live Operating Systems section (#1600)

Remove the following operating systems, because of described issues

KNOPPIX:
  - Site has optional HTTPS, so all links, will make you go back to HTTP
  - Source code distributed on ISOs, no online repositories/tarballs

Puppy Linux:
  - Site is only over HTTP
  - Looks like garbage

Tiny Core Linux:
  - Site is only over HTTP
  - Not really usable or useful
  - Looks like garbage

Add Debian and Fedora to Worth Mentioning PC Live Operating Systems,
since they are recommended as normal operating systems and support
LiveUSB.

_includes/nav.html

@@ -87,7 +87,7 @@
           </summary>
           <span class="nav-dropdown">
             <a class="dropdown-item" href="/operating-systems/#os"><span class="fas fa-th-large fa-fw"></span> PC OS</a>
-            <a class="dropdown-item" href="/operating-systems/#live_os"><span class="fas fa-compact-disc fa-fw"></span> Live CD OS</a>
+            <a class="dropdown-item" href="/operating-systems/#live_os"><span class="fas fa-compact-disc fa-fw"></span> PC Live OS</a>
             <a class="dropdown-item" href="/operating-systems/#mobile_os"><span class="fas fa-mobile-alt fa-fw"></span> Mobile OS</a>
             <a class="dropdown-item" href="/operating-systems/#aaddons"><span class="fas fa-th fa-fw"></span> Android Privacy Add-ons</a>
             <a class="dropdown-item" href="/operating-systems/#firmware"><span class="fas fa-signal fa-fw"></span> Router Firmware</a>

_includes/sections/live-operating-systems.html

@@ -1,4 +1,4 @@
-<h1 id="live_os" class="anchor"><a href="#live_os"><i class="fas fa-link anchor-icon"></i></a> Live CD Operating Systems</h1>
+<h1 id="live_os" class="anchor"><a href="#live_os"><i class="fas fa-link anchor-icon"></i></a> PC Live Operating Systems</h1>
 
 {% include cardv2.html
 title="Tails"
@@ -10,30 +10,17 @@ website="https://tails.boum.org/"
 git="https://git-tails.immerda.ch/tails/"
 %}
 
-{% include cardv2.html
-title="KNOPPIX"
-image="/assets/img/svg/3rd-party/knoppix.svg"
-image="/assets/img/svg/3rd-party/knoppix-dark.svg"
-description='Knoppix is an operating system based on Debian designed to be run directly from a CD / DVD (Live CD) or a USB flash drive (Live USB), one of the first of its kind for any operating system. When starting a program, it is loaded from the removable medium and decompressed into a RAM drive. The decompression is transparent and on-the-fly.'
-badges="info:GNU/Linux"
-labels="warning:contrib:This software may depend on or recommend non-free software."
-website="https://www.knopper.net/knoppix/index-en.html"
-source="https://www.knopper.net/knoppix-info/index-en.html#license"
-%}
-
-{% include cardv2.html
-title="Puppy Linux"
-image="/assets/img/svg/3rd-party/puppy_linux.svg"
-description='Puppy Linux operating system is a lightweight Linux distribution that focuses on ease of use and minimal memory footprint. The entire system can be run from RAM with current versions generally taking up about 210 MB, allowing the boot medium to be removed after the operating system has started.'
-badges="info:GNU/Linux"
-labels="warning:contrib:This software may depend on or recommend non-free software."
-website="http://puppylinux.org/"
-source="http://distro.ibiblio.org/puppylinux/"
-%}
-
 <h3>Worth Mentioning</h3>
 
 <ul>
-  <li><a href="https://distro.ibiblio.org/tinycorelinux/">Tiny Core Linux</a> <span class="badge badge-info">GNU/Linux</span> <span class="badge badge-warning" data-toggle="tooltip" title="This software may depend on or recommend non-free software.">contrib <i class="far fa-question-circle"></i></span> - A minimal Linux operating system focusing on providing a base system using BusyBox and FLTK. The distribution is notable for its size (15 MB) and minimalism, with additional functionality
-    provided by extensions.</li>
+  <li>
+    <a href="https://getfedora.org/">Fedora Workstation</a>
+    <span class="badge badge-info">GNU/Linux</span>
+    - Fedora is a Linux distribution developed by the Fedora Project and sponsored by Red Hat. Fedora Workstation is a secure, reliable, and user-friendly edition developed for desktops and laptops, using GNOME as the default desktop environment.
+  </li>
+  <li>
+    <a href="https://debian.org/">Debian</a>
+    <span class="badge badge-info">GNU/Linux</span>
+    - Debian is a Unix-like computer operating system and a Linux distribution that is composed entirely of free and open-source software, most of which is under the GNU General Public License, and packaged by a group of individuals known as the Debian project.
+  </li>
 </ul>