Add Qubes OS nav item (#751)

Signed-off-by: Daniel Gray <dng@disroot.org>

_data/nav/3_operating_systems.yml

@@ -11,7 +11,7 @@ items:
     file: _evergreen/linux-desktop.md
   - type: link
     title: Qubes OS
-    icon: fab fa-linux
+    icon: pg-qubes
     file: _evergreen/qubes.md
   - type: link
     title: Router

_data/providers/cloud/1_nextcloud.yml

@@ -19,9 +19,9 @@ downloads:
     url: 'https://nextcloud.com/install/#install-clients'
   - icon: fab fa-freebsd
     url: 'https://www.freshports.org/www/nextcloud/'
-  - icon: ptio-openbsd
+  - icon: pg-openbsd
     url: 'http://openports.se/www/nextcloud'
-  - icon: ptio-netbsd
+  - icon: pg-netbsd
     url: 'http://pkgsrc.se/www/php-nextcloud'
   - icon: fab fa-android
     url: 'https://f-droid.org/packages/com.nextcloud.client/'

_data/providers/cloud/3_tahoe-lafs.yml

@@ -14,7 +14,7 @@ downloads:
     url: 'https://github.com/tahoe-lafs/tahoe-lafs#via-pip'
   - icon: fab fa-linux
     url: 'https://github.com/tahoe-lafs/tahoe-lafs#using-os-packages'
-  - icon: ptio-netbsd
+  - icon: pg-netbsd
     url: 'http://pkgsrc.se/filesystems/tahoe-lafs'
   - icon: fab fa-github
     url: 'https://www.tahoe-lafs.org/trac/tahoe-lafs/browser'