ci: Fix xh installation

Author: RemiBardon

.github/workflows/test.yaml

@@ -158,10 +158,8 @@ jobs:
 
       - name: Install xh
         run: |
-          curl -fsSL https://apt.cli.rs/pubkey.asc | sudo tee -a /usr/share/keyrings/rust-tools.asc
-          curl -fsSL https://apt.cli.rs/rust-tools.list | sudo tee /etc/apt/sources.list.d/rust-tools.list
-          sudo apt-get update
-          sudo apt-get install -y xh
+          eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+          brew install --formula xh
 
       # Install our fork of Step CI (has more features we need).
       # - name: Install Step CI