chore(yafti): Apply changes from -deck to desktop (ublue-os#1911)

* chore: Minor yaml syntax fixes

* chmod +x protontricks-launch (ublue-os#1901)

Fixed permissions on `protontricks-launch` to actually be executable.

* chore(yafti): Apply changes from -deck to desktop

---------

Co-authored-by: Kyle Gospodnetich <[email protected]>
Co-authored-by: termdisc <[email protected]>

Author: 3 people

system_files/deck/shared/usr/share/ublue-os/firstboot/yafti.yml

@@ -48,7 +48,7 @@ screens:
     values:
       title: Application Installation
       show_terminal: true
-      package_manager: yafti.plugin.flatpak
+      package_manager: yafti.plugin.run
       groups:
         Add input group to current user:
           description: Adds the input group to your current user. Required by certain controller drivers.