gdk update fails on Manjaro Linux because it's trying to use apt-get instead of pacman

Overview

On Manjaro Linux, trying to gdk update will result in an "apt-get: command not found" error. However, the package manager for Manjaro is pacman, not apt-get. gdk update used to work on Manjaro up until just yesterday (at the time of this issue creation).

Impacted categories

The following categories relate to this issue:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Steps to replicate (optional)

Proposal (optional)

Environment (optional)

• Operating system name: Linux Manjaro 5.15.78-1-MANJARO #1 SMP PREEMPT Thu Nov 10 20:50:09 UTC 2022 x86_64 GNU/Linux
• Architecture: x86_64
• The contents of your gdk.yml (if any)

runner:
  token: H1T2P8D5LjCWpyubhWJq
  network_mode_host: true

• Ruby version: ruby 2.7.7p221 (2022-11-24 revision 168ec2b1e5) [x86_64-linux]
• GDK version: 6b4b8291