Fix CI, don't have access to the preinstalled Linuxbrew inside a container

Author: gwynne

.github/workflows/test.yml

@@ -71,10 +71,13 @@ jobs:
         uses: actions/checkout@v4
       - name: Install xcbeautify
         run: |
-          eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
-          brew install xcbeautify
+          DEBIAN_FRONTEND=noninteractive apt-get update
+          DEBIAN_FRONTEND=noninteractive apt-get install -y xz-utils curl
+          curl -fsSLO 'https://github.com/tuist/xcbeautify/releases/download/1.0.1/xcbeautify-1.0.1-x86_64-unknown-linux-gnu.tar.xz'
+          tar -x -J -f xcbeautify-1.0.1-x86_64-unknown-linux-gnu.tar.xz
       - name: Run tests
+        shell: bash
         run: |
           set -o pipefail && \
             swift test --sanitize=thread --enable-code-coverage |
-            xcbeautify --is-ci --quiet --renderer github-actions
+            ./xcbeautify --is-ci --quiet --renderer github-actions