Switch images to svgs, where possible (#1563)

Closes #1361, #1362

_includes/sections/operating-systems.html

@@ -6,7 +6,7 @@
 
 {% include cardv2.html
 title="Qubes OS"
-image="/assets/img/tools/Qubes-OS.png"
+image="/assets/img/svg/3rd-party/qubes_os.svg"
 description='Qubes is an open-source operating system designed to provide strong security for desktop computing. Qubes is based on Xen, the X Window System, and Linux, and can run most Linux applications and utilize most of the Linux drivers.'
 badges="info:Xen"
 labels="warning:contrib:This software may depend on or recommend non-free software."
@@ -17,7 +17,7 @@ tor="http://qubesosfasa4zl44o4tws22di6kepyzfeqv3tg4e3ztknltfxqrymdad.onion/"
 
 {% include cardv2.html
 title="Fedora Workstation"
-image="/assets/img/tools/Fedora.png"
+image="/assets/img/svg/3rd-party/fedora.svg"
 description='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.'
 badges="info:GNU/Linux"
 labels="warning:contrib:This software may depend on or recommend non-free software."
@@ -27,7 +27,7 @@ git="https://src.fedoraproject.org/"
 
 {% include cardv2.html
 title="Debian"
-image="/assets/img/tools/Debian.png"
+image="/assets/img/svg/3rd-party/debian.svg"
 description='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.'
 badges="info:GNU/Linux"
 website="https://www.debian.org/"