setup/index.md: cleanup

Follow up to the https://review.jami.net/c/jami-docs/+/31095 patch.

Attempt to show image in TOC.

Change-Id: I31b53e0f4f45c9478c6fc916140f885f853f78a6

setup/index.md

@@ -26,15 +26,16 @@ google-play
 
 ### Jami for GNU/Linux
 
-Select your preferred distribution below, or opt for a universal package installer.
+Select the distribution or universal package installer.
 
-#### Supported distributions:
+#### Distribution
 
 ```{list-table}
 :header-rows: 0
 
 * - ```{toctree}
     :maxdepth: 1
+    :titlesonly:
 
     alma-linux
     alpine-linux
@@ -43,17 +44,19 @@ Select your preferred distribution below, or opt for a universal package install
     cent-os-stream
     clear-linux-os
     crystal-linux
-    debian (![«Image: Debian»](images/debian-logo.png "Debian"))
+    ![«Image: Debian»](images/debian-logo.png "Debian") Debian <debian>
     deepin
     elementary-os
     endeavour-os
     endless-os
     fedora-linux
-    gentoo-linux
     ```
   - ```{toctree}
     :maxdepth: 1
+    :titlesonly:
 
+    gentoo-linux
+    gnu-guix
     kde-neon
     kubuntu
     linux-mint
@@ -65,11 +68,12 @@ Select your preferred distribution below, or opt for a universal package install
     open-suse
     pardus
     pisi-gnu-linux
-    pop-os
     ```
   - ```{toctree}
     :maxdepth: 1
+    :titlesonly:
 
+    pop-os
     pure-os
     raspberry-pi-os
     red-hat-enterprise-linux
@@ -84,14 +88,13 @@ Select your preferred distribution below, or opt for a universal package install
     ```
 ```
 
-#### Universal Package Options:
+#### Universal package installer
 
 ```{toctree}
 :maxdepth: 1
 
 flathub
 snap-store
-gnu-guix
 ```
 
 ### Jami for iOS